Sandra Bullock was worried about her bum being on show too much when filming 'Gravity'.

The 49-year-old actress, who has been nominated for an Oscar Award for female lead Dr. Ryan Stone in the hit sci-fi movie, made sure she had the best figure possible for the role as many scenes show her from behind.

According to The Sun newspaper, she said: ''I worked out hard for this movie, I had to because there is a lot of me on show. I had a few arguments about the scenes where I'm basically in my underwear with pants that don't even cover my bottom!

''I'm flying away from the camera so my butt is in people's faces a lot. I mean, why is that necessary?''

Sandra is also up for Best Actress at the BAFTA Awards 2014 on Sunday, February 16 at London's Royal Opera House.

She is up against Judi Dench, Cate Blanchett, Emma Thompson and Amy Adams in her category at the annual ceremony.

Speaking at the annual Academy Awards Nominees Luncheon in Beverly Hills on Sunday (10.02.14), Sandra also said: ''I worked with the nicest, kindest, most patient group of people who all had a tremendous amount riding on them because of new technology, unknown waters.

''It should have been a very stressful situation, but everybody was so supportive that I had one of the best filming experiences I've ever had.''