Who Wants to be a Millionaire fans do a double take as Hollywood A-lister appears – and wins huge jackpot

He was paired with a quiz show legend on the ABC series

WHO Wants To Be A Millionaire fans were left blindsided when a Hollywood A-Lister popped up in the hotseat.

Viewers of the cash-prize quiz show were bemused as the screen star swapped acting for answering brain-teasing questions.

Oscar winner Matt Damon, 54, appeared in the hotseat alongside Ken Jennings, 51 – and the pair made light work of the challenge.

The Pearl Harbour star, sported a rugged look with a bushy beard and long hair, and appeared to be elated to be partnered with the Jeopardy! legend.

The show also saw him reignite his “feud” with Who Wants To Be a Millionaire re-boot host Jimmy Kimmel, 57.

Jimmy, who hosts and executive produces the series – as well as having the idea for the celebrity special – was left red-faced as Ken said: “Everybody but Jimmy Kimmel.

“Do we love Matt Damon or what?”

The lively studio crowd cheered as The Martian star Matt said: “Ah you guys thank you so much.

“You are making him so miserable right now,” referring to anchor Jimmy.

Jimmy then said: “You are turning this into an uprising!”

THE KILLER QUESTION

Ken and Matt progressed all the way to the $1milllion question.

At the final stage, they were tasked with the question: “Which of these words is used to describe one of the most beautiful auditory effects on Earth, the sound made by the leaves of trees when wind blows through them?”

The pair opted to use their 50/50 lifeline, which reduced the options to Susurrus – the correct answer – and phoney reply Petrichor.

As they chose the correct answer – which Ken knew before the lifeline was used – Jimmy told him: “You know you won this on your own, right?”

Matt then interjected: “Wow wow,” as Ken said: “You caught a break, you caught a break.

“Sometimes it’s better to be lucky than good I think.”

Jimmy then mused: “Maybe Millionaire isn’t harder than Jeopardy!”

Matt, who could be seen giggling in delight, said: “It is so awesome having Ken Jennings as your partner in a trivia game, I can’t tell you.”

The funds from the ABC game show will be donated to Matt’s non profit organisation, water.org.

The US Sun was first to reveal Ken’s Millionaire role back in June.

In the same month, we exclusively reported host Jimmy’s future on the game show after five years as anchor.

KEN’S GLOWING GAME SHOW HISTORY

Ken is known for his record-breaking, consecutive 74-game winning streak on the game show Jeopardy! when he first appeared on it as a contestant.

Ken first appeared on Jeopardy! as a contestant on June 2, 2004.

His winning streak then ended that November.

He earned over $2.5million and became the highest-earning American game show contestant at the time.

Ken later became a host of the show and has also written several books.

The news of Ken’s new game show stint comes after he could be seen in the trailer for the new Happy Gilmore 2 movie.

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They used a 50/50 in the $1million question – but Ken already knew the answerCredit: ABC

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Pearl Harbor actor Ben gushed about having Ken as his partnerCredit: ABC