Joaquin Rafael Phoenix (; ne Bottom; born October 28, 1974) is an American actor, producer, and activist. For his work as an actor, Phoenix has received a Grammy Award, a Golden Globe Award, and has three Academy Award and British Academy Film Award nominations. Phoenix started acting in television shows with his brother River Phoenix and sister Summer Phoenix.

In 2006, Phoenix was invited to join the Academy of Motion Picture Arts and Sciences. In 2007, Phoenix reunited with director James Gray for the film We Own the Night, which he also produced. In the film, Phoenix played a New York nightclub manager who tries to save his brother and father from Russian mafia hit men. The film premiered at the 2007 Cannes Film Festival, receiving mixed reviews from critics and grossed a total of $54.5 million worldwide. Critic Peter Travers described Phoenix as "electrifying and then some", and he was awarded the People's Choice Award for Favorite Leading Man for the performance. For his second film of 2007, Phoenix also reunited with director Terry George for the film Reservation Road. In it, Phoenix played a father obsessed with finding out who killed his son in a hit-and-run accident. The film failed at the box office and received negative reviews from critics, with film critic Peter Travers writing "Even the best actors -- and I'd rank Joaquin Phoenix and Mark Ruffalo among their generation's finest -- can't save a movie that aims for tragedy but stalls at soap opera." Phoenix made his third collaboration with director James Gray in the film Two Lovers (2008), where he played a bachelor torn between the family friend his parents wish he would marry and his beautiful but volatile new neighbor. Two Lovers premiered in competition at the 2008 Cannes Film Festival in May, receiving largely positive reviews, especially Phoenix who was praised by film critics David Edelstein who wrote "He [Phoenix] is, once again, stupendous, and stupendous in a way he has never been before" and Roger Ebert describing his performance as "perfect pitch". Two Lovers grossed $16 million worldwide. Phoenix's mockumentary film I'm Still Here (2010) premiered at the 67th Venice International Film Festival on September 6, 2010. The film was directed by Phoenix's then brother-in-law Casey Affleck and was also written by Affleck and Phoenix himself. The film purports to follow the life of Phoenix, from the announcement of his retirement from acting, through his transition into a career as a hip hop artist. Filming officially began on January 16, 2009 at a Las Vegas nightclub. Throughout the filming period, Phoenix remained in character for public appearances, giving many the impression that he was genuinely pursuing a new career. Although widely suspected to be a "mockumentary," the fact that the events of the film had been deliberately staged was not disclosed until after the film had been released. The film received mixed reviews and failed at the box office. After the releasing of the film, Phoenix took a self-imposed break from acting.Answer this question using a quote from the following article:

What was this movie about?
Phoenix played a father obsessed with finding out who killed his son in a hit-and-run accident.