The couple had headed to the Spanish city for their first romantic break as a couple, and ended up rubbing shoulders with none other than Love Island's Hannah Elizabeth and her boyfriend George Andreetti!
Taking to Instagram, Hannah shared a photo of herself and George with Marnie and Lewis and gushed about her evening spent with them.
She told her followers: "Had a ball with these two last night in Barcelona ... Hurry up n come see me n @george_andreetti again soon @marniegshore @lewisbloor1 #ball #pacha (sic)."
Double date, perhaps?
Their meet up comes after Hannah made sure to show both Lewis and Marnie her support while they were starring on Celebrity Big Brother. She had urged her fans to vote for both Lewis and Marnie on the show, and tweeted her upset when Lewis was evicted just before the series finale.
Hannah said: "So u would all watch if the house wos filled with the likes of ricky n katie ? Coz i wouldnt booooooring @lewis_bloor should not of gone! (sic)"
Marnie, meanwhile, came fourth on CBB and it was Ex On The Beach's Stephen Bear that took the crown.
She and Lewis got together while in the house, with former TOWIE star Lewis confessing he was in love with Marnie after just ten days into the series.
Since CBB wrapped, the pair have proved they are giving their romance a go and Marnie recently shunned claims she and Lewis are putting on a showmance.
Insisting the pair want to keep things between them private instead, the Geordie Shore star explained: "We have been offered all kinds of magazine and TV interviews, but we are keeping it private for the time being because we don't want to put a strain on our relationship. There was so much talk of us being a 'showmance', but the funny thing if neither of us are the type of people to court the media for money or fame."
Hannah, meanwhile, is currently loved-up with beau George. They first went public with their romance back in April, and Hannah has since gushed that he is her "proper one" following her failed engagement to Jon Clark.
She and George recently revealed they have moved to Spain to start a "new chapter" together.
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