Katie Holmes knows herself better because of her daughter.

The 'Dawson's Creek' star credits her 10-year-old daughter Suri, who she has with her ex-husband Tom Cruise, for encouraging her to take on a directorial role in 'All We Had'.

She told Entertainment Tonight: ''The mother-daughter theme [of] that unending love that you have for your mother and for your child is universal.

''Suri gets a special thanks for everything, [for] every job I do, because she makes every day great and awesome and better. I know myself better because of her, so she'll always get a special thanks.

''It's taken a long time to take the risk. I feel fortunate because I have a wonderful support group around me.''

Meanwhile, Katie previously admitted that she found it ''challenging but rewarding'' deciding to step behind the camera for the first time.

She explained: ''I was actually on both sides [of the camera]. It was an undertaking, but the movie was produced by Jane Rosenthal and you couldn't ask for a better producer, so I felt very taken care of.

''It was very challenging! But very, very rewarding. Hopefully you just get better every time you do it. That's what I'm hoping for.''

And Katie has got the support of Judy Greer, who says she's a ''great director''.

She said: ''She's amazing. She wasn't bossy, no ... I mean, she's bossy, don't get me wrong, but she was never bossy with me.

''I liked working for her a lot. It's fun to get immediate feedback from your friends about your performance. It's great! It's always fun to have someone come and see what you're doing from a different view. She's a great director. I think she's gonna be fine.''