Robin Williams (18 images)

Robin Williams (L) and John Travolta play the infield while shooting the movie "Old Dogs" at Shea Stadium in New York City on July 26, 2007. (UPI Photo/John Angelillo)

(L-R) Connor Rayburn and John Travolta field baseballs on the set of the movie "Old Dogs" at Shea Stadium in New York City on July 26, 2007. (UPI Photo/John Angelillo) .

Comedian Robin Williams signs service members autographs during the second stop of the 2007 USO holiday tour at Camp Arifjan, Kuwait on December 17, 2007. Tour host Chairman of the Joint Chiefs of Staff, U.S. Navy Adm. Mike Mullen was joined by award winning recording artist Kid Rock, Miss USA Rachel Smith comedian Lewis Black and 7-time Tour de France champion Lance Armstrong on the 15-stop, 7-country tour thanking the forward deployed troops for their sacrifice and service. (UPI Photo/Chad J. McNeeley/Department of Defense)

Actor Robin Williams (R), a cast member in the motion picture comedy "Man of the Year," arrives with his wife Marsha Garces Williams at the premiere of the film at Grauman's Chinese Theatre in the Hollywood section of Los Angeles on October 4, 2006. (UPI Photo/Jim Ruymen)