Jack Osbourne admits his baby 'wasn't planned'.

The 25-year-old star recently revealed his fiancee Lisa Stelly is pregnant and the couple are thrilled at the prospect of becoming parents, despite the news coming as a surprise.

He told Britain's Star magazine: "I'm excited. It's a very good thing. It wasn't planned, if that tells you anything...

"I'm just really happy about the whole thing. It's going to be a new chapter in my life and I'm excited about it."

The 'Adrenalin Junkie' host is known for his love of extreme sports but he knows he will have to curb his wild lifestyle when he is a father.

He said: "I can't be selfish. Ultimately your priorities do shift."

Jack shot to fame in reality TV show 'The Osbournes' over 10 years ago alongside his parents Ozzy and Sharon and sister Kelly but is unsure whether he would want to do a programme about his own household.

He said: "It would have to be the right type of project. It wouldn't just be a Kardashian-type thing like 'The Osbournes' once was. I don't know if the concept would be as loose as that."