Hilary Duff carried her son, Luca Comrie, to Babies First Class in LA yesterday. The active mom is back to running errands with Luca after traveling to Indio, CA, over the weekend with her husband, Mike Comrie, and older sister, Haylie Duff, for Coachella . Fresh off her festival getaway, Hilary has jumped onto promotional duties for the latest and final installment of her Elixir trilogy, True . On Tuesday, she signed hardcover copies of her fictional love story, which was officially released the same day, at a local book shop in La Verne, CA. The multitalented star took to Twitter to share her gratitude: "Great night...Thank you to all my loyal and devoted fans. You guys mean so much to me!" While Hilary soaks in the success of her trilogy's conclusion, she also has a small-screen moment to look forward to. Hilary will guest-star as Ashton Kutcher 's onscreen girlfriend on the season finale of Two and a Half Men , which airs May 9.

By Daily Mail Reporter PUBLISHED: 18:20 EST, 17 April 2013 | UPDATED: 18:20 EST, 17 April 2013 Between swaying to the Coachella set list over the weekend and launching her third novel on Tuesday, Hilary Duff keeps a busy schedule. But after embracing her youthful side in the Californian desert and then putting on her author hat, the 25-year-old was more than thrilled to focus her attention on her true love - her son Luca Cruz. The former Disney star took her one-year-old to baby class in Sherman Oaks, California, on Wednesday morning. My son-shine: Hilary Duff beamed as she held her one-year-old son Luca Cruz snugly in her arms on Wednesday morning in Sherman Oaks, California The mother-son duo looked quite the stylish pair. Hilary wore skinny grey jeans that showed off her toned, trim legs, the ankle of which she rolled to meet the top of her camel-coloured booties. A sharp black blazer covered a loose grey T-shirt - an outfit that was ready for business or play. Keeping a playful ...

By Daily Mail Reporter PUBLISHED: 01:25 EST, 17 April 2013 | UPDATED: 02:30 EST, 17 April 2013 She's one of the most high-profile former child stars in Hollywood. But Hilary Duff is also an author, and she was busy promoting her latest book - True - at a children's store in California on Tuesday. The 25-year-old, who is rarely spotted out and about without her one-year-old tot in tow, beamed as she proudly held up a copy of her tome at Mrs Nelson's Toy & Book Shop in La Verne. Check her out! Hilary Duff looked stunning in leather trousers as she signed copies of her book True in La Verne, California on Tuesday The Lizzie McGuire actress showed off her incredible figure in leather trousers and a black sweater paired with fawn pumps. A red fedora nestled jauntily on her head. True is the final installment of Duff's Elixir trilogy. Radiant: Hilary's trilogy has been a big hit with young fans Multi-talented: Hilary enjo! yed signing copies of her book for her a...

New mom Hilary Duff, 25, is returning to television as Ashtons Kutchers love interest on the season finale of Two and a Half Men. Too bad he falls for someone else! Getty Images TVLine first reported the casting news, explaining that Duffs character has a love connection with Walden (Kutcher). E! News later added that the two dont end up together, because Walden falls for Staceys grandmother! Taxi and Celebrity Apprentice star Marilu Henner, 60, will play the older woman who steals his heart. Duff confirmed the news via Twitter on Tuesday, writing, So excited to be joining the cast of @TwoHalfMen_CBS this week! I get to play a crazy drunk girl, funnnn!!!... So lucky and excited to work with the beautiful & talented @TheRealMarilu on @TwoHalfMen_CBS this week! Today was a blast! Tune in to CBS for the Two and a Half Men finale Thursday, May 9 at 8:30 PM.

Coachella attracts fans from far and wide, including celebrities. Check out the famous faces spotted at the festival this year. [ View the story "Spotted: Celebrities at Coachella " on Storify ] Storified by Fri, Apr 12 2013 20:12:50 "WE'RE BACK BITCHES!" Coachella 2013. I forgot to breathe. pic.twitter.com/Kd2e1YjqFm ips r Katy in Coachella pic.twitter.com/xiVFp93oyJKatyCat #coachella #coachella #coachella RT @robbannasophia #coachella @alexandramccall @chloebridges whomp whomp instagram.com/p/YBXAJNtooP/Chloe Bridges Just a little celeb wrangling moment. Working hard at #coachella #missguided #peoplesrevteam #johnross #dallasKali Goodwin [PHOTO] @VanessaHudgens at #Coachella #Beautiful pic.twitter.com/ZJNZ6uVY3LTe amo, Vanessa Just met the beautiful @AngelAlessandra #omg !!! #victoriassecretmodel @ Coachella Outdoor Theatre instagram.com/p/YB3JZIkYK6/Alyssa Johnson I sure know how to party, huh? #UpInTheAir at #Coachella. #ArtWorkDreamsLife instagram.com/p/YB...

New mom Hilary Duff, 25, is returning to television as Ashtons Kutchers love interest on the season finale of Two and a Half Men. Too bad he falls for someone else! Getty Images TVLine first reported the casting news, explaining that Duffs character has a love connection with Walden (Kutcher). E! News later added that the two dont end up together, because Walden falls for Staceys grandmother! Taxi and Celebrity Apprentice star Marilu Henner, 60, will play the older woman who steals his heart. Duff confirmed the news via Twitter on Tuesday, writing, So excited to be joining the cast of @TwoHalfMen_CBS this week! I get to play a crazy drunk girl, funnnn!!!... So lucky and excited to work with the beautiful & talented @TheRealMarilu on @TwoHalfMen_CBS this week! Today was a blast! Tune in to CBS for the Two and a Half Men finale Thursday, May 9 at 8:30 PM.

Hilary Duff's post-baby body is bananas. The 25-year-old showed off her incredibly toned legs while enjoying a night out at Mercato Di Vetro with husband Mike Comrie in West Hollywood on April 6. Dressed in super-short shorts, a green blazer and nude heels, Duff proved that her body is back and better than ever after giving birth. @ mrflowers25 aka Larry...Mikey and I dattttte twitter.com/HilaryDuff/sta Hilary Duff (@HilaryDuff) April 7, 2013 Duff, who welcomed son Luca Cruz in March 2012 , has been open about her workout routine since becoming a mom. And obviously her exercise plan is working -- she recently squeezed herself into a size 26 skinny jean . "I think if you ask any pregnant mom, they're like! 'I want my body back,' but it takes time," she told Us Weekly recently. "It takes nine months for your body to get that way and it's putting ...