They reignited romance rumors when they were spotted enjoying a cozy night out together earlier this week.
And Niall Horan's new love interest, model Jessica Serfaty, 25, set pulses racing as she posed in a sexy swimwear shoot for Swedish brand, Chiquelle x.
Size 14 model Iskra Lawrence shows off her incredible curves
Displaying her peachy posterior and toned figure in all its glory, the mother-of-one dazzled in a series of scorching shots.
In one image, the former Victoria's Secret beauty flashed a glimpse of sideboob in a racy nude one-piece, which featured an 80s-style high brief cut to put her delectable derriere on show.
The catwalk queen showcased her washboard abs in blush bikini, before setting pulses racing in a sexy black semi-sheer two-piece.
Smoldering into the lens, Jessica wore her light brunette locks in beachy waves and accentuated her stunning features with low-key make-up.
Jessica and Niall, 23, were first linked back in March, but the couple set tongues wagging once again this week when they were pictured heading to a gig in Los Angeles.