Halsey also dropped what appears to be a huge hint about the baby's father ... she tagged Alev Aydin in the post. The two have been hanging out a lot recently -- going back to October, at least -- and he's a writer and producer.
As we've reported ... Halsey just scooped up Liam Payne's Calabasas mansion for a cool $10,161,150. The 9,659-square-foot home has 5 bedrooms, plus a home theatre, giant library, beautiful backyard, pool, koi pond, waterfalls, gardens and a massage/meditation house. In other words, a pretty good nesting spot.
Halsey previously sparked pregnancy rumors back in 2019, rubbing her belly with then-boyfriend Evan Peters. She later clarified it wasn't a baby bump, just a stomach full of pancakes.