Melbourne, Nov 8 (ANI): Rachel Weisz feels so fresh and excited when she acts that the British beauty says she is a "bacteria" who has just entered the world of cinema.

"The way I feel about acting is that I feel like I've really just started, which is really exciting," the Daily Telegraph quoted her, as saying.

She added: "I just feel there are so many different roles that I want to play, and different roles I know no one's seen me do, and I don't even know that I can do yet.

"So, in evolutionary terms, I feel like I'm still bacteria or something, you know. I want to be doing this when I'm an old lady."

Weisz's relationship with long-term partner director Darren Aronofsky made news when the two decided to separate in 2006 for his "dream project", The Fountain.

She had told the London Evening Standard at the time: "I think we have all heard stories of couples working together and it turns out to be a disaster.

"There is fighting on set and everything goes wrong. But we wanted to be careful.

"It was Darren's idea and it was the right thing to do.

"So we went to work and had a very professional relationship, but then we would meet on Saturday and have a fight, and make up on Sunday.

"It was very passionate and romantic."

Weisz, who is now mother to three-year-old son, Henry Chance with Aronofsky, confesses that motherhood changed her priorities.

She said: "I used to just work back to back. Now I don't do that. I do two projects a year, and take a big break between both of them.

"I have to consider where exactly I'm travelling to." (ANI)