The couple - who already have 22-month-old son Axl Jack together - are believed to be considering going down the adoption route for their second child.
A source told US' OK! magazine: ''They think it's the right time to expand their family.''
Meanwhile, an insider previously claimed that Fergie's ''obsession'' with the gym was halting any plans for her and Josh to have a baby.
They said at the time: ''Another baby just doesn't fit in with Fergie's life at the moment [even though Josh is] desperate to have another kid.''
Josh has made no secret of the fact he wants a brother or sister for little Axl.
He said: ''We've got to be very strategic in our planning for it. But the plan was to always have at least two.
''It's still crazy to think that kid is mine and that we made him. It's like, 'Holy (expletive)! We made him!'''
And whilst the 42-year-old actor would be happy having either a daughter or a son, he is secretly wishing for a boy as he admitted growing up with three sisters taught him girls could be tricky as teenagers.
He said: ''[My sisters] taught me that I would be really happy to have another son.
''Girls are great. I would be totally happy to have a girl, but ... they get to be those teenage years and [want] independence, you know? It isn't always easy - especially for the mother.''
Add this guy to your playlist ASAP.
A rising country star opens up about the UK scene.
What to look forward to at Slam Dunk Leeds 2019.
From the salt mining town of Winsford in Cheshire, The Luka State came to play in the underground confines of The Forum Basement.
She unveils her first solo album in the form of the Judy soundtrack.
Marmaduke is perhaps the world's most famous Great Dane, he was originally brought to life...
Planet Terror Trailer Robert Rodriguez, co-director of Sin City, brings you Planet Terror, a retro-futuristic...
Longtime buddies Quentin Tarantino and Robert Rodriguez have worked together before (Four Rooms, Sin City),...
Poseidon TrailerIn Cinemas June 1stIt's New Year's Eve and festivities have begun aboard the luxury...