Hilary Duff Joins Twitter, Promotes Elixir

Hilary Duff promotes her new book, “Elixir“, at Borders Books & Music, Columbus Circle on Monday (October 11) in New York City.

The 23-year-old singer/actress, who wore J Brand‘s Agnes jeans in Stealth, just joined Twitter yesterday! “I can’t believe I finally got roped into this Twitter thing,” she said. “I’ve really been living in the dark ages!”

Right before meeting up with her fans, The Duffster tweeted, “OK! heading to my very first book signing @ Borders! Whooo goin to try and do my first twitpic! Wish me luck!”

Follow Hilary and Just Jared on Twitter @HilarybeeC and @JaredEng!

10+ pictures inside of Hollywood’s latest celeb Twitter-er Hilary Duff…