Jeremy Renner

Jeremy Renner has a baby on the way - the actor is reportedly going to be a dad.

The 'Marvel Avengers Assemble' star is said to have told Eva Longoria the happy news as they chatted at the Golden Globes smoking patio at the ceremony in Los Angeles on Sunday night.

Eyewitnesses have told Us Weekly magazine they overheard Jeremy, 42, sharing the secret with the 37-year-old former 'Desperate Housewives' actress.

A source claimed the expecting mother is an ex-girlfriend of the 'Bourne Legacy' star, and is currently staying at his LA home.

One witness said: ''[Jeremy] was saying, 'I'm going to fly in when her water breaks.' ''

Another added the Hollywood hunk is trying to keep the news a secret, including the identity of the mysterious mum.

The source explained: ''They used to date but it wasn't serious ... [He] is being ultra-secretive about it, but she has been going on about her life and not hiding it.''

Jeremy has always aimed to keep his private life to himself, only speaking out about his personal business when he absolutely has to.

The actor was in a four-year relationship with actress Jess Macallan but they separated in 2010 after she decided to pursue an acting career.

© Bang Showbiz