TV bosses were forced to beef up security on the set of hit US TV show House after Olivia Wilde's love scene with black actor Omar Epps prompted death threats.
Wilde, who played seductive Dr Remy Hadley in the popular medical drama, was required to lock lips with co-star Epps for an episode in 2009.
She tells America's Cosmopolitan magazine after the program aired that she received a startling backlash from viewers who were enraged by the interracial kiss.
"We got a lot of hate mail for that," she says.
"There are racist people out there. We got hate mail that said that someone wanted to cut off my lips and kill me. We had extra security on set for a while."