Jimmy Fallon and wife welcome second child

Surprise! Jimmy Fallon has a re-run on his hands -- he and his wife, Nancy, have welcomed their second child.

A representative for the host of "The Tonight Show" said Frances Cole Fallon was born at 8:45 a.m. Wednesday, weighing 5 pounds, 11 ounces. People magazine first reported the birth.

Fallon tweeted a short but sweet message Wednesday night sharing the happy news:

Little Frances will join big sister Winnie Rose, 1. Both Fallon babies were born via surrogate.

The arrival of the new Fallon prompted NBC to cancel Wednesday and Thursday taping of the late-night show "due to unexpected but delightful circumstances." Repeats will air.

Fallon, who took over "The Tonight Show" this year, will have something to read to his brood: He has a book deal for the picture book "Your Baby's First Word Will Be Dada," scheduled for release in June.