Benedict Cumberbatch finds it awkward when men fancy his mother.

The 'Star Trek Into Darkness' star's mum Wanda Ventham has appeared in a number of British TV shows and he admitted he doesn't know how to react when he's told she is ''hot''.

He told the Daily Mirror newspaper: ''I've been trapped with men in elevators who say to me, 'Oh... I really used to like your mum. She's really hot'.

''I don't know what to say. If I say, 'No, she's not', that is really insulting to my mother, and if I say she is, it seems very wrong. She is smokin', I guess.''

The British actor - who also stars in 'The Hobbit: The Desolation of Smaug' - admitted people in the US can't quite get their head around pronouncing his name.

As well as its spelling, he joked fans sometimes confuse it for a sexually transmitted disease.

He said: ''Some people don't understand my name. Some people think it is an STD, but I don't think that is what my parents were thinking about when they christened me.''