Ryan Gosling and Eva Mendes ''can't get enough'' of parenting.

The 37-year-old actor and Eva, 44 - who have daughters Esmeralda, four, and Amada, two, together - have made a concerted effort to keep their relationship private over the years, and the couple are at their happiest when they're spending quality time with their kids.

A source shared: ''They are both in love with being parents, and can't get enough of it. Neither wants to slow down on work interests but every day is a juggling act to be with their daughters.''

The loved-up duo first met on the set of the 2012 movie 'The Place Beyond the Pines'.

And despite the closeness of their relationship, they both apparently feel it's important to give each other a certain amount of freedom.

The insider told People: ''They love and respect each other and try to give the other space to pursue what they love.''

Ryan and Eva are two of the biggest names in the movie business, but they consider their children to be their priority.

The source explained: ''Now the children come first, and they share a love for them which neither had experienced before.''

Earlier this month, Ryan revealed his daughters think he works on the Moon.

The Hollywood star admitted his kids got confused about his career after visiting him on the set of 'First Man', in which he plays astronaut Neil Armstrong.

Ryan said: ''They came to set. They came on this day where I was shooting a launch scene, so I was in the space suit and pretending to launch.

''I think they think I'm an astronaut now. My oldest said the other day, she pointed to the moon and said, 'That's where you work, right?'''