LOS ANGELES , California ( CNN ) -- Liv Tyler does n't like to be bothered by her agents at night . But it 's a good thing she took their call pitching her `` The Incredible Hulk . '' Liv Tyler plays Betty Ross , a colleague of Edward Norton 's Bruce Banner , in `` The Incredible Hulk . '' `` My agent called me one night ... I had just put [ son ] Milo to bed . It was like 9 o'clock at night , and I always get grumpy with them when they call me really late , '' she told CNN . `` They said , 'Marvel would like to fly you to Los Angeles tomorrow . Will you get on a plane to come and meet for 'The Hulk ' ? And I said I ca n't come tomorrow , but I can come the next day . '' The flight turned out to be well worth it -- though Tyler said she was discombobulated by the speed of it all . `` I went and met with [ director ] Louis [ Leterrier ] and they offered me the part that day , '' she said . `` I was kind of floored because it just happened so quickly and I did n't get to read the script . ... [ But ] it was kind of a no-brainer . '' In the new `` Hulk , '' `` The Lord of the Rings '' actress plays Betty Ross , a former colleague of scientist and Hulk alter ego Bruce Banner ( Edward Norton ) . She said working on the film brought back memories of her childhood watching the TV show starring Bill Bixby and Lou Ferrigno . ( Ferrigno has a cameo in the new film . ) `` I loved the TV show when I was a kid , '' she said . `` I used to watch it all the time with my mom . It was our favorite show . '' Tyler , 30 , said that she felt a tremendous sense of responsibility to the `` Hulk '' mythology , particularly since a 2003 film on the character met with mixed reviews . Watch Tyler , Norton and Leterrier on the latest `` Hulk '' » . `` Well , a lot of people would say -- even I said -- 'Oh , they 're making `` The Hulk '' ? ' Did n't they do that already ? '' she said . But she added , `` The fans love this so much ... and there 's so much detail to the story , I always feel quite stressed about that , like I really want to do the part justice . ... I definitely feel that responsibility and want to do the best job that I can . '' CNN 's KJ Matthews contributed to this report .
Actress Liv Tyler says ` ` Hulk '' role came unexpectedly . Tyler plays Betty Ross in new film version of Marvel superhero . Tyler says she was huge fan of TV show with Bill Bixby .