The One Direction star is allegedly expecting his first child with British singer Cheryl, and is clearly already in protective mode.

The three acts in this weekend's final of the U.K. TV talent show took part in a photocall at Wembley Arena in London on Thursday (08Dec16), when Louis, who is mentoring boy band 5 After Midnight, was asked what he thought about the prospect of a Cheryl comeback on the judging panel.

Clearly riled by the thought, Louis, who has a fiery history with Cheryl, responded: "Well Simon wouldn't invite Cheryl back because we have Nicole (Scherzinger). We have Nicole and Sharon (Osbourne), we don't need another girl. So go and f**k off now!"

Playfully pretending to slap the journalist, Louis added: "No silly questions, seriously. It's not about Cheryl. Don't be stupid, man."

But One Direction star Liam was less than impressed with Louis' response to the question, and took to his Twitter page to vent.

"Congratulations Louis Walsh for setting the worst example on handling media for his band who are about to step into a very hard industry," he wrote. "Maybe it's about time you realise it's not all about you and shut the f**k up for once, let them speak."

Despite Liam's remarks, 5 After Midnight appeared to find Louis' outburst hilarious - giggling as he let rip at the reporter, who also tried to ask about rumours the Spice Girls' trio GEM had pulled out of appearing on the show's finale.

"It's not about the Spice Girls, it's about 5 After Midnight... so stop talking about them," Louis retorted.

The clash between Irishman Louis and Liam isn't the first time the pair have butted heads. One Direction were put together by Nicole Scherzinger on the 2010 series of The X Factor, and Louis told newspaper The Telegraph at the time that the boy band shouldn't believe the hype around them.

"We create monsters in the music business – they only become famous because they’ve been on the show and we got you those songs," he said. " They’re lucky f**kers, but some get a sense of entitlement and believe the hype. Too many artists appear to forget where they came from."