Meghan Markle, Hailey Bieber and Jennifer Lopez often rock leggings on their off-duty days. Ahead, ET Style has gathered the best celebrity-approved legging styles from athleisure faves like Lululemon and Alo Yoga. See how stars wear theirs and shop the leggings for yourself. Like most of us, Meghan Markle is a big fan of beloved athleisure label Lululemon, particularly the Align Pant in black.