The store occupies the former Express store space and also space next to it where Ann Taylor was at the mall, occupying 20,650 square feet, according to Melissa Eigen, Danbury Fair marketing manager.
"We're very excited to welcome H&M back," Eigen said in announcing the store's pending arrival in May.
"It's a highly requested retailer at Danbury Fair. The clothes are very trendy They have work styles, office styles, and casual clothing for males and female."
An H&M store was previously located on the mall's lower level by Sears before it closed in 2014.
Click here to follow Daily Voice Westport and receive free news updates.