Sunday Sure Was Sweet For These First-Time Fathers

Jason became a dad for the first time when he and fiancée Olivia Wilde welcomed their son, Otis, in April 2014.

Jimmy and his wife, Nancy Juvonen, welcomed their daughter, Winnie, via surrogate in July 2013. Just before Father's Day, Jimmy and Winnie covered People magazine together!

The Duke of Cambridge became the proud father of Prince George Alexander Louis in July 2013.

John became a dad for the first time in February 2014, when he and wife Emily Blunt welcomed daughter Hazel.

Olivier became a father in October 2013 when his wife, Halle Berry, gave birth to their son, Maceo.

Josh and his wife, fellow Once Upon a Time star Ginnifer Goodwin, welcomed their son, Oliver, in May 2014.

Jason became a dad in February 2014 when his wife, Jenny Mollen, gave birth to their son, Sid.

In February 2014, Simon and girlfriend Lauren Silverman became parents to son Eric.

The former San Francisco 49ers cornerback, who is married to Kerry Washington, welcomed his daughter, Isabelle, in April 2014.

The rapper and his fiancée, Ciara, brought their baby boy, Future Zahir Wilburn, into the world in May 2014.

Justin's wife, Lia Smith, gave birth to the couple's daughter, Asa, in April 2014.