Now it appears the row is behind them. Simon told Louis, who appeared on the set of the Sir Trevor McDonald-anchored show in Los Angeles: "I humbly offer a grovelling apology Louis."

After the pair hug, Louis tells Sir Trevor: "Listen, honestly, he’s the best. He’s a really good guy and we’ve had amazing success with our artists (including Westlife and Shayne Ward) so far. And we’re going to have a lot more with our records."

He went on: "All is forgiven. Forgiven but not forgotten."

Simon said: "Let’s just say forgiven, alright."

Louis replied: "Whatever."

This Is Your Life screens on Saturday June 2, 9.25pm, ITV1.

Simon, this is your life - May 25 2007
Simon Cowell was reportedly left gobsmacked when Sir Trevor McDonald entered the live final of American Idol to give him the famous red book for the second time.

More than 30 million American viewers tuned into the episode which saw the famous British broadcaster, 67, announce: "Simon, this is your life."

British viewers will be able to see the one-off episode of This Is Your Life on June 2, after it is recorded in London on Sunday with the music mogul’s friends and family in attendance, reports The Daily Star.

Simon took it in good spirits and gave Sir Trevor a hug, while his fellow talent show judges Paula Abdul and Randy Jackson looked on in amusement.

Celebs tipped to attend the recording this weekend include fellow X Factor judge Sharon Osbourne and TV duo Ant and Dec. X Factor winner Leona Lewis and Simon’s proteges Il Divo will be performing live. Oprah Winfrey and Jennifer Lopez are also expected to record messages for the multi-millionaire.

Simon jealous of Ant and Dec’s package - May 22 2007
Ant and Dec have revealed that Simon Cowell was not a happy bunny when he found out about their whopping ITV contract.

The pair have a deal with the channel worth a reported £40 million - twice Simon’s £20 million retainer - and the X Factor judge is apparently a little jealous.

Britain’s most popular Geordies told The Sun that things came to a head when they were filming with the 47-year-old.

Dec Donnelly, 31, said: "We were filming Britain’s Got Talent and came into the studio the morning The Sun broke the story and the audience gave us a standing ovation. We were on cloud nine, but Simon just turned around and he was steaming.

"He hissed, ’You’ve curdled my milk, you’ve soured my apple’. He was so unhappy. Simon can’t bear the thought of anyone being paid more than him."

But Ant McPartlin, 31, said it was fun working with Simon again on the ITV1 show.

"We love winding Simon up, it’s great sport," he said. "He falls for it hook, line and sinker."

Simon ’doubles his money’ - May 18 2007
TV’s Mr Nasty Simon Cowell should be renamed Mr Clever after he apparently doubled his £100 million fortune by selling his latest hit TV show around the world.