Duff and husband Mike Comrie are the proud parents of a healthy, 7-pound, 6-oz baby boy named Luca Cruz Comrie.
The 24-year-old tweeted, "We are overjoyed and feel like the luckiest parents in the world."
Duff and Comrie, 31, a retired hockey player, married in August 2010.
Stars Who Recently Had a Baby
Stars Who Recently Had a Baby
Hip-hop's tiniest princess Blue Ivy Carter arrived on Jan. 7 in NYC.Beyonce and Jay-Z released a statement shortly after their bundle of joy arrived."Hello Hello Baby Blue! We are happy to announce the arrival of our beautiful daughter, Blue Ivy Carter, born on Saturday, January 7, 2012. Her birth was emotional and extremely peaceful, we are in heaven. She was delivered naturally at a healthy 7 lbs and it was the best experience of both of our lives. We are thankful to everyone for all your prayers, well wishes, love and support."
Actress Keri Russell gave birth to her daughter, Willa Lou Deary, on Dec. 27, joining 4-year-old big brother, River.
Eric Dane and Rebecca Gayheart are the proud new parents of a baby girl."Rebecca and Eric welcomed Georgia Geraldine Dane on Wednesday, Dec. 28, just in time for the New Year," their rep told People.
Grace Hightower (Robert De Niro's wife)
Robert De Niro and wife Grace Hightower De Niro are parents again.Helen Grace was born via surrogate in Dec. 2011.She is the second child for the couple, who first met in 1987 in London and are already parents to son Elliot, 13.The Academy Award winning actor, 68, also has four other children: daughter Drena, 40, and son Raphael, 35, with former wife Diahnne Abbott, as well as 16-year-old twin sons Julian and Aaron, born via surrogate with ex-girlfriend Toukie Smith.
Roselyn Sánchez and Eric Winter had their first baby, Sebella Rose Winter on Jan. 4, 2012.Shortly after her birth, the actors Tweeted, "Welcome to the world beautiful Sebella Rose Winter! Mami and Daddy adore you!"
Elizabeth Ellis (Charlie Day's wife)
Charlie Day and Mary Elizabeth Ellis had their first baby in December.The couple welcomed Russell Wallace Day on Dec. 15 in Los Angeles.The "Horrible Bosses" actor and Ellis married in 2006.
Fantasia Barrino gave birth to a son, Dallas Xavier Barrino on Dec. 13 in North Carolina.The "American Idol" season 3 winner already has a 10-year-old daughter, Zion.
Lily Allen and her husband, Sam Cooper, had a daughter on Nov. 25.Her friend Sam Chew Tweeted this message: "sending out love to lily, sam and mini cooper... YES."Allen, 26, wed Cooper, a painter and decorator, in Gloucestershire, England, last June, when she revealed she was pregnant.
Celia Walden (Piers Morgan's wife)
Piers Morgan, 46, and wife Celia Walden, 34, welcomed a daughter to the family."It's true. I've become a dad for the fourth time, to a baby girl called Elise," the "Piers Morgan Tonight" host Tweeted. "She's absurdly beautiful and utterly adorable."Piers is also dad to three boys - Spencer, 18, Stanley, 14, and Albert, 11 - from his previous marriage to Marion Shalloe.
Lindsay Price gave birth to a healthy baby boy, Hudson, on Nov.6.Price is married to Curtis Stone, who shared the good news via Twitter, writing, "Lindsay and I are so excited to welcome our sweet little baby boy into the world," writes Stone, 36. "It feels so great to be a dad!!!!"
Niki Taylor and Burney Lamar are new parents again to son Rex Harrison.The model, 36, and her husband, former NASCAR driver Burney Lamar, welcomed their son on Nov. 16.Taylor and Lamar, 31 -- who wed in December 2006 -- announced they were expecting in May.
Actress Nia Long gave birth to son, Kez, on Nov. 7.The "Soul Food" star also has 10-year-old son, Massai, from a previous marriage.
Connie Britton adopted a baby boy, Eyob, from Ethiopia in Nov.The "American Horror Story" actress said, "I thought I was going to collapse into a puddle of tears. I was just grinning from ear to ear."
Tinglan Hong (Hugh Grant's baby mama)
Hugh Grant has become a dad for the first time.Grant welcomed a daughter with London resident Tinglan Hong in Nov. Although the pregnancy was unplanned, the actor "could not be happier or more supportive."The longtime bachelor, 51, famously dated Elizabeth Hurley for 13 years, then Jemima Khan for three.
Mariska Hargitay, 47, and her husband Peter Hermann adopted a son, Andrew Nicolas Hargitay Hermann, who was born over the summer.The actress beamed, "We knew this was our guy. Everything about it felt right. It felt divinely right."
Golden Globe nominee Viola Davis became a mom in Oct."The Help" actress and husband Julian Tennon adopted daughter Genesis.
It's another girl for Tori Spelling and Dean McDermott.Spelling tweeted, "Our family's so happy 2 announce [that on] 10/10/11 [our] baby girl Hattie Margaret McDermott was born at 7:08am! Xoxo." Spelling also shared a photo of her daughter's feet.Spelling and McDermott have two other children, Stella Doreen, 3, and Liam Aaron, 4. McDermott also has a 13-year-old son, Jack, from a previous marriage.
Naomi Nelson (Johnny Knoxville's wife)
Johnny Knoxville and wife Naomi Nelson delivered daughter Arlo on Oct. 6, the "Jackass" star Tweeted."Mommy and baby are doing great," Knoxville says.Arlo joins son Rocko Akira, 20 months, and Madison, 15, his daughter with ex-wife Melanie Clapp.Knoxville, 40, and Nelson were married in September 2010.
Kristin Davis adopted daughter Gemma Rose Davis in Oct."This is something I have wanted for a very long time," Davis told People.
"The Office" star Jenna Fischer brought home her son, Weston, in Sept. with husband Lee Kirk.Fischer revealed the baby's gender on the "Jay Leno Show" in July.
Susan Downey (Robert Downey Jr.'s wife)
Actor Robert Downey Jr. and wife Susan welcomed their first son on Tuesday.Weighing in at 7 lbs., 5 ozs., Exton Elias Downey was delivered at 7:24 AM in Los Angeles, Downey Jr.'s rep confirmed to People.com."Everyone is healthy and they couldn't be happier," a friend of the couple said.Exton joins big brother Indio, 18, Downey's son from a previous marriage.