Probably not, but new paparazzi photos show them getting off the same private jet in Miami today -- and that's enough to start a dating rumor in Hollywood.
Both Miley and Kellan are single, Cyrus recently started following the "Twilight" star on Twitter and both were at the Z100 Jingle Ball in NYC over the weekend ... so it's entirely possible.
Of course, it's also possible they're just friends and nothing more.
The two were photographed getting off the jet and leaving the airport separately on Wednesday.
Cyrus is in town to perform at Miami's Jingle Ball on Friday. No word on Kellan's plans, but he has been traveling a lot while promoting his upcoming flick "The Legend of Hercules," due in theaters January 10.
Miley has been linked to quite a few guys since she and Liam Hemsworth called off their engagement earlier this year. Lutz was previously dating Sharni Vinson, but they also split in 2013.
These two would definitely make quite the attractive couple if they were dating. But for now, this is nothing more than wishful thinking!
Check out the gallery above for more VERY random celebrity pairings.
UPDATE: We got Kellan at LAX after the sighting, where he reacted to rumors he's dating Miley -- see what he said below: