Jean-Paul Aussenard, Bauer-Griffin
"Welcome to the World Luca Cruz Comrie!" Duff tweeted, adding that her bundle of joy arrived "healthy" and "beautiful," weighing 7 pounds, 6 ounces.
"We are overjoyed...He is surrounded by so much love!! Mom and baby are both doing extremely well," Duff happily told fans.
Congrats to Hilary and Mike on the new addition to their family!
See Photos of Hilary Duff's Pregnancy Evolution
- Jessica Simpson Pregnancy Photos
- Top 20 Singers With Just One Name
- 20. Dev
- Selena
- 18. Charice
- 17. Jewel
- 16. Seal
- 15. Estelle
- 14. Sade
- 14. Moby
- 12. Beck
- 11. Shakira
- 10. Morrissey
- 9. P!nk
- 8. Fergie
- 7. Rihanna
- 6. Usher
- 5. Madonna
- 4. Beyonce
- 3. Adele
- 2. Prince
- 1. Cher
- Celebrity Heroes: Musicians Who Have Saved the Day
- J.C. Chasez Saves Baby on Beach
- Kelly Osbourne Stops Car Theft and Vandalism
- Michael Jackson Saves Janet Jackson's Ex-Husband From Suicide Jump
- Garth Brooks Saves Two Kids From Burning Building
- Carrie Underwood Resuces Dog From Highway
- Christina Perri Fends Off a Carjacker
- T.I. Talks Suicide Jumper Off Ledge
- Sarah McLaughlin Saves a Rapper From Suicide
- Ryan Gosling Breaks Up a NYC Street Fight
- Top Weddings of 2012
- Justin Timberlake and Jessica Biel
- Karmin
- Jennifer Hudson and David Otunga
- Hillary Scott and Chris Tyrell
- Ne-Yo and Monyetta Shaw
- Steven Tyler and Erin Brady
- John Legend and Chrissy Teigen
- Jessica Simpson and Eric Johnson
- Britney Spears and Jason Trawick
- Musicians With Secret Embarrassing Pasts
- George Michael during his Wham! superstardom
- Drake as Jimmy on 'Degrassi: The Next Generation'
- Selena Gomez on 'Barney and Friends'
- Alanis Morissette's Pre-'Jagged Little Pill" Album
- Fergie's Time as a Wild Orchid
- Dr. Dre's World Class Wrecking Crew Days
- Katy Perry Christian Singing Past
- Accident-Prone Pop Stars
- Kelly Osbourne
- Justin Bieber
- Jessie J
- P!nk
- SkyBlu of LMFAO
- Rihanna
- Sean "Diddy" Combs
- Musicians Who Look Like Cartoon Characters
- Taylor Momsen and Kung Fu Panda
- Taylor Swift and a Japanese Anime Character
- Miley Cyrus and a Chipette from Alvin and the Chipmunks
- Nicki Minaj and Rainbow Brite
- Fergie and Janice from the Muppets
- Rihanna and Cleo, the fish from Pinocchio
- Nicole Scherzinger and Jasmine from Aladdin
- Musicians Who'd Make the Best Facebook Friends
- Rihanna Would Invite You to the Coolest Events
- LMFAO Would Leave Hillarious Comments on Your Photos
- Taylor Swift Would Leave the Sweetest Messages on Your Wall
- Justin Bieber Would Update His Newsfeed With Funny Viral Videos
- Miley Cyrus Would Post Adorable Photos of Her Pets
- Lea Michele Would Post Helpful Hints and Good Advice
- Katy Perry Would Post Nostalgic Photos
- Jessica Simpson Would Post Ridiculous Photos of Herself
- Justin Timberlake Would Keep Us 'In the Know' With His Status Updates
- Biggest Transformations in Music
- Justin Timberlake
- Beastie Boys
- Dave Grohl
- Feist
- Black Eyed Peas
- The Beatles
- 50 Cent
- Marky Mark Wahlberg
- Darius Rucker
- Ice T
- Katy Perry
Watch 'Pregnant Hilary Duff on Baby Names'
Watch Hilary Duff's 'Beat of My Heart' Video
Alvin
Kellie Pickler Gets Puppy Surprise After Moving 'Dancing With the Stars' Performance
Kellie Pickler Named 'Dancing With the Stars' Champion
J. Cole Performs 'Born Sinner' on 'Late Night With Jimmy Fallon,' Reveals Competitive Spirit Against Kanye West
Blake Shelton Joins NBC in Organizing Oklahoma Tornado Benefit Concert
Chief Keef Receives Apology From Katy Perry
Charlie Sheen Gets Back To His Roots
Beyonce Releases New Anthem, 'Grown Woman'
That's An Interesting Look, Madge
Black Hippy Release 'U.O.E.N.O.' Remix
WHOOPS! Obama Makes Big Gaffe
Toby Keith Returns to Help Family, Friends in Moore, Oklahoma
Candid Portraits Of Strippers After Hours
Mariah Carey's Dress Busts Open During 'GMA' Performance
16 Pasta Dishes Worse Than Yours
Blake Shelton's 'Healing in the Heartland' Benefit Show to Include Reba McEntire, Miranda Lambert More
Mariah Carey Curses And Busts Out Of Dress On Live TV
AMAZING PHOTO: UFO Spotted Over San Diego
Killed Soldier In London Attack Identified
Abercrombie Announces Plummeting Sales Amid Controversy
What It's Like To Talk To A 2-Year-Old
Luke Wilson Caught Staring At Fan's Chest
Best Friends Reportedly Die Holding Each Other In Tornado
Danny Tanner Is Fighting With Topanga
Rapper Accused Of Faking His Own Death To Escape Payments
New Trayvon Martin Evidence Features Incriminating Photos, Texts From Teen
Jury Foreman: '18 Days Of Testimony Hurt' Jodi Arias
Teenager's 'Awww'-Inspiring Drawing Wins Big At Google
Surgeons Remove Giant Hairball From Tiger
Brave Woman Stood Down Armed London Attackers
WATCH: Police Force Shows Up To Support 5-Year-Old Who Lost Her Dad
Jodi Arias Jury DEADLOCKED
Mum-Of-Two Faces Down Woolwich Attack Suspects
'DWTS' Shakeup Ahead?
27 Comments