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| Alexie Gilmore arrives for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (REUTERS/Fred Prouser) |
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| Keri Lynn Pratt arrives for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (REUTERS/Fred Prouser) |
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| Robin Williams arrives for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (REUTERS/Fred Prouser) |
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| Billy Crystal arrives for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (REUTERS/Fred Prouser) |
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| Bobcat Goldthwait and Robin Williams arrive for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (REUTERS/Fred Prouser) |
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| Robin Williams with daughter Zelda arrive for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (REUTERS/Fred Prouser) |
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| Robin Williams and Billy Crystal arrive for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (REUTERS/Fred Prouser) |
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| Robin Williams with Susan Schneider arrive for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (REUTERS/Fred Prouser) |
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| Billy Crystal arrives for the premiere of the movie 'World's Greatest Dad' in Los Angeles on August 13, 2009. (AP/Matt Sayles) |
'World's Greatest Dad'
