1. Johnny Galecki is 22 years older than his partner, Alaina Meyer. Axelle / FilmMagic
He's 47, and she's 25. Paul Archuleta / FilmMagic
2. Michael Sheen is 26 years older than his wife, Anna Lundberg. Jeff Spicer / Getty Images
He's 53, and she's 27. Valerie Macon / AFP via Getty Images
3. Dane Cook is 26 years older than his fiancée, Kelsi Taylor. Tommaso Boddi / Getty Images
He's 50, and she is 24. Matthew Simmons / Getty Images for SBIFF
4. Josh Duhamel is 21 years older than his wife, Audra Mari. Axelle / FilmMagic
He's 49, and she's 28. Rodin Eckenroth / Getty Images
5. John Stamos is 23 years older than his wife, Caitlin McHugh. David Livingston / Getty Images
He's 59, and she's 36. Phillip Faraone / Getty Images
6. Mel Gibson is 34 years older than his girlfriend, Rosalind Ross. Michael Tran / FilmMagic
He's 66, and she's 32. Barry King / Getty Images
7. Casey Affleck is 23 years older than his girlfriend, Caylee Cowen. Michael Buckner / Variety via Getty Images
He's 47, and she's 24. Mondadori Portfolio / Mondadori Portfolio via Getty Images
8. Helena Bonham Carter is 21 years older than her boyfriend, Rye Dag Holmboe. David M. Benett / Dave Benett/Getty Images
She's 55, and he's 34. David M. Benett / Dave Benett/Getty Images for Harper's Bazaar
9. Steven Tyler is 39 years older than his girlfriend, Aimee Preston. Steve Granitz / FilmMagic
He's 74, and she's 35. Jean Baptiste Lacroix / Getty Images
10. David Foster is 35 years older than his wife, Katharine McPhee. Presley Ann / Getty Images for Imagine LA
He's 73, and she's 38. Jamie Mccarthy / Getty Images
11. Stephen Fry is 30 years older than his husband Elliott Spencer. Sopa Images / LightRocket via Getty Images
He's 65, and he's 35. Jeff Spicer / Getty Images
12. Tommy Lee is 24 years older than his wife, Brittany Furlan. Axelle / FilmMagic
He's 60, and she's 36. Kevin Winter / Getty Images
13. David Hasselhoff is 27 years older than his wife, Hayley Roberts. Arnold Jerocki / WireImage
He's 69, and she's 42. David M. Benett / Dave Benett/Getty Images
14. Patrick Stewart is 39 years older than his wife, Sunny Ozell. Axelle / FilmMagic
He's 82, and she's 43. Matt Winkelmeyer / Getty Images
15. Lionel Richie is 40 years older than his girlfriend, Lisa Parigi. Christopher Polk / Variety via Getty Images
He's 73, and she's 33. Shannon Finney / Getty Images
16. Dolph Lundgren is 39 years older than his fiancée, Emma Krokdal. Jc Olivera / Getty Images
He's 64, and she's 25. Daniele Venturelli / Daniele Venturelli/Getty Images
17. Russell Crowe is 27 years older than his girlfriend, Britney Theriot. Mondadori Portfolio / Mondadori Portfolio via Getty Images
He's 58, and she's 31. Maria Moratti / Getty Images
18. Nicolas Cage is 31 years older than his wife, Riko Shibata. Leon Bennett / Getty Images
He's 58, and she's 27. Tim Mosenfelder / Getty Images
19. Sam Taylor-Johnson is 23 years older than her husband, Aaron Taylor-Johnson. Stephane Cardinale - Corbis / Corbis via Getty Images
She's 55, and he's 32. Alberto E. Rodriguez / Getty Images
20. Kris Jenner is 25 years older than her boyfriend, Corey Gamble. Cindy Ord / Getty Images for The Met Museum/Vogue
She's 66, and he's 41. John Shearer / WireImage
21. Alec Baldwin is 27 years older than his wife, Hilaria Baldwin. Jason Mendez / Getty Images
He's 65, and she's 38. Angela Weiss / AFP via Getty Images
22. Jason Statham is 20 years older than his wife, Rosie Huntington-Whiteley. Ian West / PA Images via Getty Images
He's 55, and she's 35. Gregg Deguire / WireImage
23. Dennis Quaid is 39 years older than his wife, Laura Savoie. Mike Coppola / Getty Images
He's 68, and she's 29. Marco Garcia / Getty Images for Lionsgate Entertainment
24. Jeff Goldblum is 31 years older than his wife, Emilie Livingston. Axelle / FilmMagic
He's 70, and she's 39. Jb Lacroix / Getty Images
25. Billy Joel is 33 years older than his wife, Alexis Roderick. Gilbert Carrasquillo / FilmMagic
He's 73, and she's 40. Walter Mcbride / WireImage
26. Ioan Gruffudd is 20 years older than his girlfriend, Bianca Wallace. David M. Benett / Dave Benett/Getty Images
He's 49, and she's 29. Pascal Le Segretain / Getty Images
27. Finally, Kelsey Grammer is 24 years older than his wife, Kayte Walsh. Sopa Images / LightRocket via Getty Images
He's 67, and she's 43. Taylor Hill / FilmMagic,
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