Ryan Reynolds and Blake Lively became parents for the third time recently, but so far they've both kept quiet on their latest bundle of joy.

Not much was known about the actors' third child, but Reynolds shared a picture of the trio on Twitter for the first time.

Rather than a gratuitous grab for likes, however, the Canadian used the opportunity to spread the word on climate change, urging his fellow Canucks to vote to shape the country's climate policy next week.

While the sprog's name has yet to be revealed and its face was covered, he did reveal that they had had a third daughter. The new addition is a sister to 4-year-old James and 2-year-old Inez.

Yesterday, it was revealed that Reynolds will star in 'Imaginary Friends', a new film co-written and directed by John Krasinski. Lively, meanwhile, will next be seen in 'The Rhythm Section', which was filmed largely in Dublin and will be released early next year.