Owen Wilson is excited to become a dad for a second time.

The 44-year-old actor is expecting a child with his former personal trainer Caroline Lindqvist, 42, and although they are not in a relationship, Owen plans to be a hands-on father.

A source close to the 'Wedding Crashers' star told People.com: ''Caroline is expecting a baby with Owen. It was not planned but they are both excited.''

The insider added: ''They are not living together, but Owen is involved. He comes to doctor's appointments and makes sure Caroline is doing well.''

'The Internship' star Wilson already has a two-year-old son, Robert Wilson, with his ex-girlfriend Jade Duell. They split just five months after the tot was born in January 2011 but are still on good terms.

The actor first met Caroline not long after his split from actress Kate Hudson and his 2007 suicide attempt.

He initially hired her to be his personal trainer and their relationship then briefly turned romantic but they are no longer together.

The fitness guru filed for divorce from her husband, Beverly Hills plastic surgeon Dr. Ritu Chopra, in May.

Although she is still legally married, the source insisted: ''She didn't cheat with Owen. Caroline was separated before she got pregnant.''