Secret well kept - Eva Mendes, Ryan Gosling welcome daughter

Hollywood stars Eva Mendes and Ryan Gosling have welcomed a second daughter, after once again keeping the pregnancy under wraps, TMZ reported.

The 'Training Day' star, reportedly gave birth to a baby girl, which they have named Amada Lee Gosling, late last month.

A birth certificate obtained by TMZ shows the little one - who is a younger sister to the couple's other daughter, Esmeralda, 19 months - was born just after eight in the morning on April 29 at Providence St. John's Health Centre in Santa Monica, California.

Bang

The news of the birth will come as a shock to fans as it was only two weeks earlier that rumours started to circulate that the happy couple - who have been together since 2011 - were due to welcome a new addition to their brood.

Representatives for the American actress and Canadian star, 35, did not immediately confirm the report.

The stars already have a daughter Esmeralda, born in 2014.

For both pregnancies, Mendes, a Cuban-American born in Miami but raised in California, chose to rarely, if ever, appear in public, or appeared artfully wrapped in scarves and shawls.

Actor-director Gosling met Mendes on set while filming "The Place Beyond the Pines" (2012), in which they played a couple with a baby.

Gosling, a frequent candidate on the world's sexiest men list, is known for his roles in 'Drive' and 'Crazy, Stupid, Love.'

The actor - whose previous partners have included Sandra Bullock - was shortlisted for an Academy Award for 2006's 'Half Nelson.'

Gosling served up his hugely-anticipated directorial debut 'Lost River' at the Cannes Film Festival in 2014, which had some critics screaming in pain and others singing his praise.

Last year he played an arrogant banker in 'The Big Short,' and his police comedy 'The Nice Guys' comes out this month.