Some people say that age is only a number, while others wouldn't be comfortable dating someone who even a few years their senior. Age differences in relationships are definitely a subjective and personal thing.

When we see photos and read interviews about happy celebrity couples, we might assume that they're the same age. They seem so thrilled to be together and we don't automatically think that they would date someone who is a decade older or younger. But as it turns out, some of our favorite star-studded couples actually have really big age gaps that are surprising to learn about. And sometimes, a movie or TV star fell in love with someone who isn't even part of the Hollywood world at all, and they decided to ignore the years between them.

Here are 20 celeb couples with the biggest age gaps.

20 Scott Disick Has 15 Years On His Love Sofia Richie

According to Cheat Sheet, Scott Disick is 15 years older than his girlfriend Sofia Richie. We've seen tons of photos of the famous couple on wild, amazing vacations or just walking around looking lovey-dovey, and we might not have realized that there was such a significant age gap. He is 36 whereas Sofia is only 21. Yeah, that's definitely a big gap.

19 Mary-Kate Olsen's Husband Is 17 Years Her Senior

We don't hear about the Olsen twins all that often anymore, but we probably remember that MK Olsen got married a few years ago.

According to Cosmopolitan, Mary-Kate Olsen's husband, Olivier Sarkozy, is 17 years older than her. The former child star and famous fashion designer is 33 years old, and he is 50 years old.

18 Jay-Z And Beyoncé Have A 12-Year Gap

Cosmopolitan says that there is a 12 year age gap between Beyoncé and Jay-Z, which is definitely interesting to think about. We know that they have an epic romance (although it has been rocky), but we might forget that there's an age difference. Beyoncé is 38 and Jay-Z is 50.

17 Ryan Reynolds Is 11 Years Older Than Blake Lively

We might never have found out that there was an 11-year age gap between actors Blake Lively and Ryan Reynolds, as Us Weekly has mentioned. The two are such a famously cute, perfect couple that it's easy to think that they must be the same age. They're an example of an over-the-moon happy couple, that's for sure.

16 The Handsome George Clooney Has 17 Years On His Amazing Wife Amal Clooney

When George Clooney found his soulmate and one true love in Amal Clooney, we all were super sad that he was off the market... but also glad that he had found someone after being a bachelor for so many years.

Harper's Bazaar says that there is a 17 year age gap between the two. George is 58 and Amal is 41.

15 J. Lo Was Almost Two Decades Older Than Her Former Beau Casper Smart

J. Lo has had her fair share of romances over the years. Cosmopolitan says that when Jennifer Lopez was with Casper Smart, their relationship had an 18 year gap. That's pretty big since it's almost two decades.

The singer might say that her "love don't cost a thing," but maybe she should have a song about how age is just a number, too.

14 Priyanka Chopra Is 11 Years Older Than Hubby Nick Jonas

Priyanka Chopra and Nick Jonas have a fairy tale romance and got married in December of 2018. They always look adorable and in love.

According to Harpers Bazaar, there's a 10-11 year age gap: she is 37 while the singer is 27. It's definitely true for them that age doesn't matter because we can see that they're thrilled to be husband and wife.

13 Bob Saget (AKA Danny Tanner) Is 23 Years Older Than Kelly Rizzo

People mentions Bob Saget as another celebrity who has a big age gap with his partner. While the actor that we all know and love as Full House character Danny Tanner is 63 years old, his wife, Kelly Rizzo (who is a journalist) is 49. We love this picture of them and can see that age doesn't mean anything at all.

12 It's A 20-Year Age Gap For Rosie Huntington-Whiteley And Jason Statham

Women's Health says that there's a 20-year gap between Rosie Huntington-Whiteley and Jason Statham. The 32-year-old actress and model has been with her partner since 2010, and Jason is exactly 2o years her senior at 52. They've got huge grins on their faces in this pic, and they're so stylish, too.

11 Dennis Quaid And His Fiancée Have A 39-Year Age Difference (Yes, Really)

We all grew up watching the Lindsay Lohan film The Parent Trap and enjoyed watching Dennis Quaid as the dad. These days, he's making headlines for another reason: he has a really young fiancé.

According to Women's Health, his fiancé, Laura Savoie, is actually 39 years older than him. W0w.

10 Alec Baldwin Is 26 Years Older Than Hilaria

Alec and Hilaria Baldwin got married in 2012, and the beautiful couple are still going strong. Women's Health points out that they have quite the age gap: the actor is actually 26 years older than her.

If people wonder whether a relationship can survive this kind of age gap, this couple is definitely an example of what is possible.

9 Heidi Klum Married Tom Kaulitz And She's G0t 17 Years On Him

It was love for Heidi Klum when she met Tom Kaulitz and she clearly didn't care that he was 17 years younger than her, as Women's Health points out.

The supermodel, who is 46, recently married the 30-year-old singer. According to People, she said, “He enjoys life and is very generous. He’s super kind. I just found my partner finally, you know?” Awww.

8 David Foster Is 69 And Katharine McPhee Is Only 35

We might recognize Katharine McPhee from the TV show Smash or maybe we're big fans of American Idol where we watched her fifth season run.

People says that the singer and actress is 35 while her new husband David Foster is 69, making that a pretty massive age gap. It's honestly a bit mind-boggling that they have such an age difference.

7 Who Knew Ellen DeGeneres Was 61 And Portia De Rossi Was 46?

We all love seeing Ellen DeGeneres and Portia de Rossi together, and the comedian/ talk show host and actress make a great couple.

Harper's Bazaar points out that they are another star-studded couple who have a big age difference: Ellen is 61 and Portia is only 46. We would never know it just by looking at them.

6 The Age Gap For 'Full House' Star John Stamos And Wife Caitlin McHugh Is 23 Years

We love Uncle Jesse (okay, John Stamos) and are so glad to see that he has found love and happiness. He is also a dad to his son, Billy, who is still shy of two years old.

People says that John Stamos is over 20 years older than his wife, Caitlin McHugh.

5 64-Year-Old Bruce Willis Has A 41-Year-Old Wife

Bruce Willis has definitely moved on from being married to Demi Moore, the couple who are famous for still hanging out and even going on vacation together.

Well, the actor has found love again, and according to Harper's Bazaar, his wife, Emma Heming Willis, is only 41 whereas he is 64.

4 Michael Douglas And Catherine Zeta-Jones Have A 25-Year Gap

Did we know that there were 25 years between actors Michael Douglas and Catherine Zeta-Jones? According to Harper's Bazaar, that's the age gap between this celebrity couple. While Michael is 75, Catherine is 50.

They have been husband and wife since 2000, so we can see that things have worked out between them.

3 Elon Musk Is 48 And His Girlfriend, Singer Grimes, Is 31

Elon Musk and Grimes are another celebrity couple who have a big age gap. While the Canadian singer is only 31 years old, he is 48 years old.

That's quite the age difference, right?! A lot of people might feel that this is too much... but it does seem to work for them. According to The Cut, they say really sweet and adorable things about each other.

2 Steven Tyler's One True Love Aimee Preston Is 40 Years Younger

Us Weekly also mentions Steven Tyler as a celebrity who has a much younger partner. His love, Aimee Preston, is actually 40 years younger than him.

This just might be the biggest age gap that we've ever heard of. But, again, if it works for them, then it works for them, and even just based on this pic alone, we can see how they are basically glowing because they're together.

1 The Age Gap Between Leo DiCaprio And Camila Morrone Is 22 Years

According to Us Weekly, Leo is 22 years older than his girlfriend, Camila Morrone.

We haven't really seen Leo in a super serious relationship that seemed to be going well, so it's really nice to see the actor seeming to settle down. Well, we can hope, at least, based on this pic of him and Camila where they look blissfully happy.

Sources: Us WeeklyPeopleCosmopolitanThe CutHarper's BazaarWomen's Health