Jeremy Renner is ''miserable'' when he's away from his daughter.

The 43-year-old actor, who has a 14-month-old girl, Ava, with ex-girlfriend Sonni Pacheco, says becoming a father has been the best thing that's ever happened in his life and he tries to spend as much time as possible with his child.

Asked about his feelings on fatherhood, the 'Avengers' star said: ''It's the best thing I've ever done. I like starting and ending my day with her. When I don't, life is quite miserable.''

Renner admits that having a child has also completely changed his attitude to his career.

He explained to the new issue of People magazine: ''I thought I liked what I do for a living, but now I have this little wonderful creature, and she kind of squashes all that. She's messed up my life in the most beautiful way possible. She takes all of my love.''

Aside from his success in Hollywood, Renner makes a lot of money from renovating old properties and selling them in Los Angeles.

The actor, who sold one mansion for $17 million profit, gets a kick from restoring old buildings back to their former beauty.

He said: ''I could probably make a lot more money razing the structure and building something new. But in LA there's a lot of great architecture, especially from the 1920s. I find great homes that need some love and bring them back.''