Shelley Malil has been arrested for attempted murder after allegedly stabbing his ex-girlfriend over 20 times.
Kendra Beebe suffered major bleeding following the attack, which happened outside her home in the San Diego area.
The former couple have two children together, who were inside the home when the incident happened. Neigbours who witnessed the vicious attack helped Kendra by stopping bleeding from the wounds.
One neighbour, Charleton Lee, told KNSD: "Her chin was almost entirely cut off. She had a huge gash in her arm that looked like a really deep wound that was bleeding profusely."
Shelley, who has starred in the movie 40 Year Old Virgin as well as sitcoms Scrubs and Seinfield, was arrested on Monday night at a train station.