The couple who are notoriously private about their relationship are so far keeping quiet on the rumours, but sources have reportedly 'confirmed' to Us Weekly that Eva is pregnant again.
According to the US outlet, sources revealed that Eva was trying to hide her growing baby bump while on set for a photo-shoot recently.
If the news is true, Eva and Ryan's baby joy comes nearly two years after they welcomed their first child together, daughter Esmeralda.
Throughout Eva's first pregnancy, she and Ryan managed to keep their news a secret, with news only breaking once Eva had reached seven months. That's pretty remarkable, right?
The couple had dispelled baby rumours previously, but Ryan and Eva welcomed Esmeralda on 12 September 2014.
Again, Eva and Ryan decided not to publicly announce her arrival, but later opened up on parenthood in the months that followed their baby girl's birth.
Eva revealed she was adjusting to life as a new mum in an interview with Violet Grey magazine. She said: "For me that part of being a mother at this early stage is the struggle of not being able to sleep and not knowing what I'm doing and really going through it with her and battling out those nights."
Eva and Ryan, 34, have been dating since 2011 when they starred together in movie The Place Beyond The Pines. They aren't the only Hollywood couple rumoured to be welcoming a new addition, as reports claim Blake Lively and Ryan Reynolds have another baby on the way too.
Again, Blake and Ryan are just as coy when it comes to their personal lives and are yet to confirm the news. However, a source has told E!: "They are very excited. Blake always wanted two or three kids."
Like Eva, Gossip Girl star Blake was reportedly seen with a prominent baby bump while on set filming earlier this week.
Blake and Ryan are already parents to daughter James, one. She was born on 16 December 2014.
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