Halle's Big Bump Premiere

Proud mother-to-be Halle Berry showed off her baby bump at last night's premiere of her new film, Things We Lost in the Fire.

The Oscar-winning actress, who is four months' pregnant, braved the cold October evening in Leicester Square dressed in a low-cut, backless, purple Versace gown.

The 41-year-old spent more than half an hour signing autographs and showing off her bump to photographers.

Asked about how it felt to be pregnant, the actress described it as "fantastic".

She said that she did not know whether the baby was a boy or a girl and added that she had not thought of any names.

Halle said she knew she was ready for children after playing the role.

"I knew from playing a mother in this movie and having two adorable smart children around me all the time that I was meant to be a mother.”

"It's no mystery that right after we finished the movie it manifested itself in my life because I think I subconsciously knew 'Yes, I can do this. I'm really, really ready'."

The baby's father is Halle's boyfriend, model Gabriel Aubry who is 10 years her junior.

The couple met while shooting an advert for Versace in 2005.