He is known for his roles as Alby Grant on the television series Big Love (2006–11) and Gavin Belson on Silicon Valley (2014–19), as well as his performances in the films The Last Days of Disco (1998), American Psycho (2000), and The Aviator (2004).

[5] Ross garnered critical acclaim for his role as Alby Grant in the HBO series Big Love for five seasons.

Before that, Ross made seven short films, including The Language of Love, which premiered at a prior Sundance festival.

[6][7] Mortensen's performance in the film earned multiple accolades, including an Academy Award nomination for Best Actor.

He is married to the writer Phyllis Grant, with whom he has two children: Isabel "Bella" and Dashiell "Dash" Ross.