Apparently not interesting in hiding it anymore, the couple were spotted "making out all night" while at a bar in Los Angeles, as Us Weekly confirms.
Another source spotted them, saying they were "holding hands throughout the night and [were] super cuddly."
Fans had previously spotted the pair getting cosy AF while on vacay in the Bahamas last month...
A source told E! News, "It’s true that Hailee and Niall are dating, but at this point it’s still pretty casual."