Apr 15, 2011 09:54 GMT  ·  By

Things are heating up between Scarlett Johansson and her latest beau, actor Sean Penn. After making their first public appearance as a couple at Reese Witherspoon’s wedding, the two have moved in together, says a new report.

The stars have been dating for more or less about three months, but there’s no denying they’re really enjoying each other’s company – so much so that Scarlett has moved in with Sean.

Us Magazine claims to have it from a reliable source that, while they’re not “officially” living together, they’ve been doing just that for the past couple of weeks.

“Relocating from her temporary digs at a West Hollywood hotel, the recently divorced 26-year-old ‘has essentially moved in over the last few weeks,’ the source says,” the celebrity magazine reports.

“And now that the actress and Penn, 50, share the same roof after months of furtive sightings at hotspots in Hollywood, Mexico and beyond, ‘they just stay home’ whenever they can,” adds Us.

This would explain why they’ve only been seen together once or twice since reports of their romance broke in the tabloid media.

Apparently, though they’re still in the early stages of their relationship, Scarlett and Sean are quite the homebodies, choosing to stay in and spend time with the kids.

“Among their fave homebody activities? Eating in and hanging out with Penn’s kids with ex-wife Robin Wright, who are mere years younger than Johansson: daughter Dylan, 20, and son Hopper, 17,” Us writes.

Just a couple of days ago, the two actors were spotted together when out for a jog, with the paparazzi drawing attention to Scarlett’s curvier figure and rounder tummy.

Speculation that she was already pregnant with Penn’s baby immediately began, prompting Scarlett’s rep to come out with an explanation – and a denial.

“She’s outside running and it’s simply the placement of her shirt that is misleading. Scarlett is not pregnant. She’s been training for The Avengers for over four months and is in the best shape of her life,” her rep told People at the time.