PHOTOSJon Hamm Is All Smiles at 'South Park' Party
Jan. 28 2015, Updated 2:48 p.m. ET
1. Jon Hamm arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Frazer Harrison/Getty Images)
Jon Hamm arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Frazer Harrison/Getty Images)
2. Jon Hamm arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Frazer Harrison/Getty Images)
Jon Hamm arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Frazer Harrison/Getty Images)
3. Matt Stone and Trey Parker arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Frazer Harrison/Getty Images)
Matt Stone and Trey Parker arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Frazer Harrison/Getty Images)
4. Matt Stone, Larry LaLonde and Les Claypool and Trey Parker arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
Matt Stone, Larry LaLonde and Les Claypool and Trey Parker arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
5. Eli Roth arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Frazer Harrison/Getty Images)
Eli Roth arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Frazer Harrison/Getty Images)
6. Eli Roth arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
Eli Roth arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
Want OK! each day? Sign up here!
7. John Taylor, Simon Le Bon, Nick Rhodes and Roger Taylor arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
John Taylor, Simon Le Bon, Nick Rhodes and Roger Taylor arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
8. Matt Stone and Nick Rhodes arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
Matt Stone and Nick Rhodes arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
9. Julie Brown arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo" Christopher Polk/Getty Images)
Julie Brown arrives at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo" Christopher Polk/Getty Images)
10. Matt Stone and Trey Parker arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
Matt Stone and Trey Parker arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
11. Matt Stone and Trey Parker arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
Matt Stone and Trey Parker arrive at "South Park's" 15th Anniversary Party at The Barker Hanger on September 20 in Santa Monica, California. (Photo: Christopher Polk/Getty Images)
12.
