See How Stars Celebrated Mother's Day! Celebaby Roundup! Hilary Duff Marks Mother's Day in Her Bikini! Baby's Debut: Celebrity Tots' First Official Photos Hilary Duff Runs Around LA With Luca and Celebrates Her Book Release Hilary Hits the Park With Luca and Takes On Two and a Half Men Hilary Duff Cuddles Sleepy Luca on a Sweet Mother-Son Outing Hilary Duff and Birthday Boy Luca Get the Party Started Hilary Duff Takes Her Little Ladies' Man to Class in LA Slam Dunk! Sporty-Chic Styles to Work on — and Off — the Court Leo, Mark, Hilary, and More Make Up a Star-Studded Lakers Crowd Hilary Duff Hangs With Baby Luca and Cleans Out Her Closet For a Cause Hilary Duff Shows Luca Love While Prepping For His First Holiday Hilary Duff Balances Baby Luca in Beverly Hills Hilary Duff Devotes the Day to Her Crawling Cutie Luca Reese Gets Honored With Support From Megan, Hilary, and More Hilary Duff Breaks Out Her Skinnies For an Outing With Luca Hilary Duff's LA Afternoon Is All About Little Luca 10 Celeb-Approved Hats to Instantly Update Your Fall Look! Hilary Duff Does a Grocery Run With Adorable Little Luca Celebrities Love Rag & Bone's Harrow Booties — Shop the Fall Essential! Hilary Duff and Luca Check Out Fashionable Furnishings in LA Hilary Duff's Little Man Luca Makes a Cute Fashion Statement John Mayer Gets a Haircut and Parties Postsplit