The mature coming out gay film Beginners, starring Christopher Plummer and Ewan McGregor, will open the 54th annual San Francisco International Film Festival on April 21 at the Castro Theatre.

Mike Mills, the film's writer-director, and Plummer will appear at the screening.

Beginners is partially based on Mills' own true-life experience with his father.

In the film, Oliver (played by McGregor) tells the story of his father, Hal (Plummer), trying to catch up on lost time after coming out gay at the age of 75. Hal begins to openly embrace his sexuality by socializing with other gay men and dating a man about the same age as his son (Goran Visnjic).

Hal is also attempting to reconnect with his son after being told he's terminally ill. (The video is embedded in the right panel of this page.)

Focus Features, the company that brought us Milk and The Kids Are All Right, acquired Beginners at its premiere last year at the Toronto International Film Festival. The company recently acquired worldwide distribution rights to the lesbian teen drama Pariah, which premiered in January at the Sundance Film Festival.

Beginners opens nationwide in June.