'Two and a Half Men' fans know Melanie Lynskey as the wacky and sweetly diabolical Rose, who may or may not have been responsible for the untimely demise of Charlie Harper. But in the Sundance hit film 'Hello I Must Be Going,' the actress takes on a far different role -- that of a rather reluctant cougar.

In the movie, Lynskey plays a 30-something woman who, after a nasty divorce, moves back home with her parents (played by Blythe Danner and John Rubinstein) and winds up getting involved with a 19-year-old guy played by Christopher Abbott (he's Charlie on HBO's 'Girls'). The age difference isn't the only complication -- their families are also friends, and their fathers are business associates.

A trailer for the film highlights the pitfalls (and sometimes, pratfalls) of the tale, and ends with a laugh-out-loud moment where Lynskey looks for her young beau at a party only to have one of his friends remind her just how out of place she feels.

'Hello I Must Be Going' doesn't have a release date yet, but reports indicate it'll be out sometime after Labor Day.

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