Eva Mendes and longtime partner Ryan Gosling are expecting their second baby together, it has been reported.

The Hollywood couple are already parents to 19-month old daughter Esmeralda who they welcomed in September 2014.

Multiple sources have now told Us Weekly that Mendes is pregnant again, with one source saying that she sported a burgeoning baby bump during a photoshoot in February.

Mendes and The Notebook star met on the set of The Place Beyond the Pines in 2011 and are notoriously protective of their private lives. They have not yet shared a photo of their daughter.

Representatives for the couple have not commented on the reports.

Gosling recently gushed about his love for Mendes and their daughter, telling Hello magazine: "My biggest investment is my family.

"I'm with the person I'm supposed to be with - I'm not looking for anything else beyond Eva - and I feel very lucky that we have a beautiful, healthy daughter, who is an angel. That's investment enough for me."