Two years after his "Seinfeld" appearance, Jon Favreau caught his big break alongside Vince Vaughn in 1996's "Swingers." In addition to acting, Favreau, now 47, has directed several successful movies including "Elf" and "Iron Man." This year, Favreau appeared in the movies "Identity Thief" and "Iron Man 3." —XFINITY Entertainment Staff (Photo by Alexander Tamargo/Getty Images)
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