1. Johnny Galecki is 22 years older than his partner, Alaina Meyer.
He's 47, and she's 25.
2. Michael Sheen is 26 years older than his wife, Anna Lundberg.
He's 53, and she's 27.
3. Dane Cook is 26 years older than his fiancée, Kelsi Taylor.
He's 50, and she is 24.
4. Josh Duhamel is 21 years older than his wife, Audra Mari.
He's 49, and she's 28.
5. John Stamos is 23 years older than his wife, Caitlin McHugh.
He's 59, and she's 36.
6. Mel Gibson is 34 years older than his girlfriend, Rosalind Ross.
He's 66, and she's 32.
7. Casey Affleck is 23 years older than his girlfriend, Caylee Cowen.
He's 47, and she's 24.
8. Helena Bonham Carter is 21 years older than her boyfriend, Rye Dag Holmboe.
She's 55, and he's 34.
9. Steven Tyler is 39 years older than his girlfriend, Aimee Preston.
He's 74, and she's 35.
10. David Foster is 35 years older than his wife, Katharine McPhee.
He's 73, and she's 38.
11. Stephen Fry is 30 years older than his husband Elliott Spencer.
He's 65, and he's 35.
12. Tommy Lee is 24 years older than his wife, Brittany Furlan.
He's 60, and she's 36.
13. David Hasselhoff is 27 years older than his wife, Hayley Roberts.
He's 69, and she's 42.
14. Patrick Stewart is 39 years older than his wife, Sunny Ozell.
He's 82, and she's 43.
15. Lionel Richie is 40 years older than his girlfriend, Lisa Parigi.
He's 73, and she's 33.
16. Dolph Lundgren is 39 years older than his fiancée, Emma Krokdal.
He's 64, and she's 25.
17. Russell Crowe is 27 years older than his girlfriend, Britney Theriot.
He's 58, and she's 31.
18. Nicolas Cage is 31 years older than his wife, Riko Shibata.
He's 58, and she's 27.
19. Sam Taylor-Johnson is 23 years older than her husband, Aaron Taylor-Johnson.
She's 55, and he's 32.
20. Kris Jenner is 25 years older than her boyfriend, Corey Gamble.
She's 66, and he's 41.
21. Alec Baldwin is 27 years older than his wife, Hilaria Baldwin.
He's 65, and she's 38.
22. Jason Statham is 20 years older than his wife, Rosie Huntington-Whiteley.
He's 55, and she's 35.
23. Dennis Quaid is 39 years older than his wife, Laura Savoie.
He's 68, and she's 29.
24. Jeff Goldblum is 31 years older than his wife, Emilie Livingston.
He's 70, and she's 39.
25. Billy Joel is 33 years older than his wife, Alexis Roderick.
He's 73, and she's 40.
26. Ioan Gruffudd is 20 years older than his girlfriend, Bianca Wallace.
He's 49, and she's 29.
27. Finally, Kelsey Grammer is 24 years older than his wife, Kayte Walsh.
He's 67, and she's 43.
