The birth of their first child caused a media storm and sources say that it will happen again soon.
Tom Cruise and Katie Holmes, who welcomed daughter Suri this year, are reportedly eager to add more children to their family.
Cruise has two adopted children, Isabella and Conor, with ex-wife Nicole Kidman.
And while the couple are yet to make their union official, a source told National Enquirer magazine that Homes is enthusiastic about becoming a mum again.
'She loves being a mum and can't wait to do it again. But first, she wants to be Tom's wife - so they've made a pact,' the insider explained.
The Hollywood mega-stars, who have dodged bad press after Cruise's contract with Paramount Studios was not renewed, are believed to be planning a wedding for autumn.
'Tom's always intended to make Katie his wife, but other things kept getting in the way. Now, the thought of becoming a biological father for the second time has put their wedding on the front burner,' the source claimed.
Cruise and Holmes started dating in early 2005, were engaged two months later in Paris and welcomed Suri this April.