Celtic fans have caused outrage after chanting about Queen Elizabeth's death and their hate for the royal family during Wednesday night's 4-2 Champions League defeat to Aston Villa.
Prince William, a Villa fan, was in attendance for the match at Villa Park.
But the royal's presence sparked reaction a reaction from supporters, who could be heard aiming some vile chants in his direction.
One referred to the death of Queen Elizabeth in 2022. Fans were heard singing 'Lizzie's in a box'.
Celtic fans have caused outrage after chanting about Queen Elizabeth's death and their hate for the royal family during Wednesday night's 4-2 Champions League defeat to Aston Villa
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And they also heard chanting 'if you hate the Royal Family clap your hands', too.
The songs have caused outrage on social media, with fans condemning the actions of Celtic supporters.
One wrote: "Wonderful advertisement for Scotland and its tourist industry. Not. Will the club or their government issue an apology?"
A second simply fumed: "Hideous."
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Another expressed their outrage by saying: "A heavy fine and a ban from all European competitions are required."
A fourth penned: "Absolutely disgusting behaviour."
A fifth raged: "Disgusting, whatever your views on the royal family is."
And a sixth wrote: "Use facial recognition and ban supporters inciting hatred at matches for life."
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Celtic's night against Villa got off to torrid start on Wednesday.
A quick brace from Morgan Rogers put the hosts 2-0 up inside just five minutes, with the visitors left reeling.
Celtic then came roaring back, however, with Adam Idah netting twice in three minutes to spark wild celebrations in the away end.
Ollie Watkins, who also missed a penalty, restored Villa's lead in the 60th minute.
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Celtic supporters directed their chants towards Prince William, who was cheering Aston Villa on
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And Rogers completed his hat-trick in stoppage time to fire Villa through to the next round of the competition, with Unai Emery's side finishing eighth in the Champions League table.
Speaking after the game, Emery expressed his delight with the result.
"We are very proud of our work and our way in the Champions League this year of our work last year getting to be in the Champions League," he said.
"The Premier League is very difficult to get in the Champions League because there are a lot of strong teams who are contenders. But it's very important how we are here and where we started.
Celtic beat Aston Villa 4-2 in the Champions League on Wednesday night with Morgan Rogers scoring a hat-trick and Ollie Watkins also on target
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"Now we enjoy the way and today was fantastic.
"The fans were excited and very motivated. It was a very good European match."
As well as Villa, Liverpool, Barcelona, Arsenal, Inter Milan, Atletico Madrid, Bayer Leverkusen and Lille are through to the round of 16.
