<P> After the success of Blue Sky (1994) and Circle of Friends (1995), O'Donnell played Dick Grayson / Robin in Batman Forever . He reportedly was part of a field of candidates that included Leonardo DiCaprio, Matt Damon, Jude Law, Ewan McGregor, Corey Haim, Corey Feldman, Toby Stephens, and Scott Speedman . Producers narrowed their choices to DiCaprio and O'Donnell . At a comic book convention, they asked a group of 11 - year - old boys, the target audience, which actor could win a fistfight . After the boys overwhelmingly declared O'Donnell the winner, he was ultimately given the role . O'Donnell was said to be 20th Century Fox's favorite choice to play Jack Dawson in Titanic, but DiCaprio ended up with the role . </P> <P> O'Donnell followed with a starring role in 1996's The Chamber, based on the John Grisham novel . He subsequently reprised his role as Robin in 1997's Batman & Robin . Although a box office success, the movie was critically panned and O'Donnell himself called it a low point in his career . He was considered for the lead role in Spider - Man, when the project was in development with James Cameron directing in 1996 . Tobey Maguire was ultimately cast . </P> <P> O'Donnell did not appear in another movie for two years . He was the producers' original choice for the role of James Darrell Edwards III / Agent J in Men in Black (1997), but, after turning it down because he thought the character would be too similar to his role in Batman Forever, the role went to Will Smith . The Robert Altman film Cookie's Fortune, The Bachelor (1999) and Vertical Limit (2000) were only moderately successful . Following Vertical Limit, a four - year hiatus led some to believe Batman & Robin had damaged O'Donnell's career . However, he came back in 2004 with the widely praised Kinsey . He also appeared in the 2004 episode of Two and a Half Men entitled "An Old Flame With A New Wick ." O'Donnell took a lead role in the Fox Network television series Head Cases in 2005 . The show was the first of the fall 2005 season to be canceled, and only two episodes were aired . He was subsequently cast as veterinarian Finn Dandridge on the ABC medical drama Grey's Anatomy . </P> <P> O'Donnell featured prominently in the TNT miniseries The Company as CIA case officer Jack McAuliffe, a character who progressed from spoonfed Yale elitist to jaded, post-Cold War cynic . Film projects for 2008 included Kit Kittredge: An American Girl and Max Payne . </P>

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