21 Celebrity-approved gym leggings

Kendall Jenner in Alo

Hailey Bieber in Alo

Kendall Jenner in Year of Ours

Jennifer Lopez in Stax

Hailey Bieber in Alo

Bella Hadid in Alo

Reese Witherspoon in Spanx

Lori Harvey in Lululemon

Vanessa Hudgens in White Fox

Kendall Jenner in Nike