02/16/2014 02:30 pm ET Updated Feb 27, 2014

Emily Blunt And John Krasinski Welcome Baby Girl

Jason Merritt via Getty Images

Congratulations, Emily Blunt and John Krasinski!

Blunt gave birth to a baby girl, Hazel, on Sunday (Feb. 16), Us Weekly noted. The proud papa shared the joyous news on Twitter.

The 30-year-old actress celebrated her baby shower in December at their Los Angeles home, People magazine reported. She was joined by her loved ones and friends, including Jennifer Aniston, Kristen Bell and Amy Adams.

"It was a very casual shower," a source told the mag. "Emily seems very excited about the baby and looks great. She opened gifts of baby clothes and plush toys in front of her guests as they enjoyed cookies and chocolate. Everyone was oohing and ahhing."

The couple, who wed in 2010, announced they were expecting their first child together back in September. In a 2012 interview with Modern Luxury, Blunt described being married to Krasinski as "an effing blast."