Jessica Biel has revealed that she worries she is going to run out of money because she doesn’t know where her next pay cheque is coming from.

The actress, who is dating pop star Justin Timberlake, said she can go months without getting any film offers and often worries that she won’t be able to pay her bills.

The A-Team star, 28, told BBC Radio1: ‘Since I was so young when I started [acting] I didn’t think about it [money]…

‘But as I got older and started to become an adult, and then had to get a car and pay for insurance and all those things… it’s a huge worry.’

She added: ‘For example, I haven’t worked at all this year.

‘I haven’t made a film, so I haven’t had a pay cheque and I won’t do anything until September and I don’t know if I’ll do anything after…

‘Even when it seems like you make enough money, you sometimes don’t know when the next cheque is coming in.’

Jessica Biel has revealed that she often craves fast food.

The actress told British Glamour that she generally tries to stay in shape for her film roles but sometimes allows herself to eat things which are unhealthy.

“I’m not a perfect person who doesn’t mess up, eat bad, not work out — I do all those things,” she explained.

“It’s just for the most part, when I’m working, I don’t feel like I have the choice. I have to bring my A-game.”

She added that she counts on sessions with a personal trainer to burn off the calories from fattening meals.

“I do like potato chips, French fries and Barney’s burgers in LA with seasoned curly fries. Turkey chili is good, but it will give you terrible farts!” she said.

“I have an amazing trainer, Jason Walsh, who I work with two or three times a week. We do lots of circuit and strength training, especially for my legs and my back, because it’s quite weak from years of gymnastics. I concentrate on making everything strong, and you can’t do that with just cardio.”

Hollyscoop caught up with Jess at the premiere of her new movie Planet 51, and asked her if she was ready to take her relationship to the next level with JT.

We asked, “The latest trend in Hollywood is adoption; what are your thoughts on it?”

But Jess seems to be complacent with the way things are right now, saying, “Oh not for me at this moment. I have a dog and that is hard enough.”

Jessica Biel is to be mistress of ceremonies at this Saturday’s scientific and technical Oscars presentation. The kudofest takes place at the Beverly Wilshire with taped excerpts airing in the Feb. 22 Oscar telecast.