Well, file these two under unlikely showbiz pals.
Somehow dinner and a movie don't quite seem like enough. So, pray tell, what does one do while double dating with such a superstar?
Dinner and a TV show, apparently.
"We stayed in, cooked steaks, and watched Shameless," Rossum told the magazine. "It was all very normal, and she is so nice."
So just how did these two get to be friends? Well, Gaga's current paramour, Taylor Kinney, costarred alongside Emmy and her beau, Tyler Jacob Moore, in the Showtime hit. Cozy!
Meanwhile, the 25-year-old also briefly opened up to the magazine about moving on in the wake of her surprise divorce (surprise, because no one realized she was married to begin with) from Justin Siegel.
"Everyone messes up in relationships and has peaks and valleys in their personal lives," she said. "When I realized it wasn't the end of the world and I would keep on standing, I knew it was going to be OK."
If you can judge someone by the company they keep, we think Emmy's doing more than just OK.