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Jimmy Fallon and Wife Welcome Baby Frances

Photograph by Rex / Rex USA

"Tonight Show" host Jimmy Fallon and his wife, producer and writer Nancy Juvonen, welcomed their second daughter into the world this morning with the birth of Frances Cole Fallon. She weighed in at 5 lbs., 11 oz. and is 18.5 inches long, People magazine reported.

Baby Frances joins big sister Winnie Rose, who is 16 months old. The power couple now enter the world of parenting two kids under 2!

Like her big sister, Frances was born via a surrogate, whose pregnancy Fallon and Juvonen kept quiet, People reported.

After becoming a father a year and a half ago, Fallon picked up the pen and wrote a children's book, "Your First Word Will be Dada." He hasn't said whether he'll do a follow-up tome inspired by their brand-new addition.

Fallon has been open about loving his role as a father, telling People back in June, "... being a father is the most exciting, amazing thing that ever happened to me. And everything’s going well on the show. My life has never been this cool.”

Fallon's paternity leave starts tonight and extends at least until tomorrow, according to a statement issued by "The Tonight Show":

"Due to unexpected but delightful circumstances, 'The Tonight Show Starring Jimmy Fallon' has had to cancel tapings for today and tomorrow. Wednesday's repeat airing will include Daniel Radcliffe, Mike Tyson and musical guest Sturgill Simpson, and Thursday's repeat guests are Gordon Ramsay, Fallonventions and musical guest Little Big Town. We look forward to resuming original episodes in the very near future."

MORE: Jimmy Fallon's Baby is Psyched for 2014

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