Keira Knightley finds romantic comedy `tricky`

London: Actress Keira Knightley says she agreed to do romantic comedy ‘Begin Again’, even though she finds the genre "tricky".

The 29-year-old tends to avoid lighter films, but couldn`t resist starring alongside Adam Levine and Mark Ruffalo in ‘Begin Again`, reports contactmusic.com. She said: "After `Anna Karenina`, I realised that I`d done five years of work where I`d died or something horrific had happened to me in absolutely everything. I wanted something more positive and with hope in it. "Romantic comedy isn`t a genre I usually go to - it`s one that I find quite tricky, but I thought this was strange enough with enough of a sort of acerbic quality to it," she added.