Katherine Heigl's daughters won't stop talking.

The 36-year-old star says her youngsters, Naleigh, six, and two-year-old Adalaide, are always chatting about something, and joked she hears the word ''no'' about ''100 times a day''.

Speaking about Adalaide's penchant for prattling, she said: ''[She] won't stop talking.

''She goes, 'No, no, no.' I know it's so cliché, but I hear that word 100 times a day. It's literally what is happening every day.''

The 'Knocked Up' actress - who is married to singer Josh Kelley, with whom she has her two adopted daughters - also joked their little one Naleigh hasn't stopped chatting since the day she learned how to speak.

Katherine added to PEOPLE magazine: ''[She] started talking like gangbusters and hasn't stopped talking for five years. Except to sleep at night.''

The quartet are set to spend the festive season at home in Utah and Katherine admits she doesn't enjoy travelling too far away at any time because she is a ''bad flier''.

The blonde star - who is set to embark on a holiday to Mexico with her family in the near future - said: ''[We're] keeping it chill and mellow in our homes in Utah.

''I try to go the least farthest possible.''