Actress Rachel Weisz has revealed that she is the happiest she has ever been since becoming a mum, and described motherhood as “just delicious”.

The 39-year-old Oscar-winner, who has a three-year-old son Henry Chance with her director fiancé Darren Aronofsky, said: “It’s amazing and I’ve never been happier in my life. Being a mum is just delicious, and Henry is so scrumptious I could just eat him up.”

The British actress, who plays a mother who falls apart after the murder of her daughter in new movie The Lovely Bones, said becoming a mother has made her more efficient.

She said: “I’m sure a lot of mums say this but, oddly enough, I find I can get a lot more done since I had Henry.

“You become better at managing your time. Suddenly, in 45 minutes, you can get twice as much done as you once did.”

But despite her joy at becoming a mum, Weisz confessed that the demands of being a mother have made her want to pull her hair out at times.

She said: “I think one of the things that mums aren’t allowed to talk about enough to one another… is the times when you’re pulling your hair out at home with the kids. Those moments when everything is crashing in and you just feel like you’re going to scream…”

She added: “Because, even though children are the most precious things in the world, they are also set to test us. I think women are already stretched and pressured to be perfect and it kind of drives me crazy.”