Kingsland Road bumped into the 'What About Us' singers in central London on Tuesday (22 October) and uploaded a picture of their meeting to Twitter soon afterwards.
And, in an X Factor connection, Rochelle is married to Marvin Humes, who shot to fame with JLS on the ITV show.
Now, we'd love to think the Kingsland Road boys sauntered around in sharp suits every day when they're not on stage, but they were actually en route to the glitzy red carpet premiere of Thor: The Dark World.
Mollie and Rochelle, meanwhile, had been on a day of promotional duties and radio appearances for new album Living For The Weekend.
After mingling with gorgeous Mollie and Rochelle, Kingsland Road joined their X Factor counterparts and Thor stars Natalie Portman and Chris Hemsworth to walk the red carpet in Leicester Square.
Clearly they had a good time, later tweeting: "OMG thor. What an Incredible film!! We've had the time of our lifes tonight! Thank you so much @TheXFactor The KINGS!"
Kingsland Road, which consists of Josh, Connor, Matt, Jay and Thompson, had a dramatic time on last weekend's X Factor after falling victim to the dreaded flash vote.
They landed in bottom place after viewers cast their votes following the Love and Heartbreak-themed episode, and endured a restless night before learning they'd face Shelley Smith in the sing-off.
In the end, Kingsland Road were saved by the judges – but they definitely hope to avoid anything similar this weekend!
"Saturday/sunday was the most horrible time of our lives," they tweeted on 23 Oct. "Who will be here this weekend to support us?!"
Check out the X Factor contestants at the Thor 2 premiere below:
Copyright: WENN Lia Toby