When Louise revealed she had cheated on then-boyfriend Andy Jordan in series six of Made In Chelsea, rumours were rife the guy involved was One Direction's Niall.
And while neither Louise or Niall actually commented on whether such claims were true or not, the Chelsea beauty's brother has confirmed Louise did enjoy a fling with the X Factor star.
Taking to Instagram while enjoying a day watching the tennis at Wimbeldon, Sam directed a message to Niall after beating the boyband star's table tennis rally record with his co-star Stevie Johnson.
He said: "You may have canoodled with my sister @niallhoran, but I sir have beaten your Evian table tennis rally score #Victory!!!"
We wonder what Louise will make of that!
She and Niall were first linked back in May 2013 when reports surfaced that the pair had spent the night together, despite Louise dating former flame Andy. While confessing she had cheated on her co-star beau onscreen, Louise didn't reveal who with.
Following the breakdown of her and Andy's relationship, speculation Louise was then dating Niall surfaced.
According to reports, Louise was keen to keep their romance under wraps, choosing to enjoy a string of dates with Niall at his London home.
Again, neither of the pair actually confirmed they were dating, but it seems Louise's baby brother has just done so two years later.
Now, however, Louise is happily loved up with her New Yorker boyfriend Alik Alfus. She and Alik met while Louise was filming Made In Chelsea's first spinoff series in NYC last year.
After striking up a romance, things between the pair became pretty serious, with Alik moving to London to be with Louise on her return back to the UK.
Despite a few minor hiccups along the way, the couple's relationship has gone from strength to strength. And even though Alik has now returned to New York to help out with his family's business, he and Louise seem more loved-up than ever.
Speaking about his sister's romance with Alik, Sam told Reveal he thinks Louise and her boyfriend can go the distance.
"100 percent they will," he told us. "She's smitten and I know he is about her."
Sam, meanwhile, is currently loved-up himself, having recently rekindled his romance with Tiffany Watson. And proving things are going very well this time round, he has even had her initials 'T.W' tattooed onto his arm.
A big step, right? Maybe, but Sam has said he doesn't regret a thing!
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