Aston Villa supporters were heard singing the national anthem in response to the Celtic fans singing anti-royal chants during Wednesday night's game.

Prince William was on home turf as he watched his favourite football team, Aston Villa, clinch a top-eight finish in the UEFA Champions League following a pulsating 4-2 victory against Celtic.

According to the Telegraph, the Prince of Wales was subject to outrageous chants of "Lizzie’s in a box" and "If you hate the Royal family, clap your hands" during Aston Villa’s Champions League clash with the Scottish club.

Some Celtic fans also held a banner in the stands in praise of an intruder who once found his way into Queen Elizabeth II’s Buckingham Palace bedroom, days after Prince William was born.

It is reported home supporters continued to sing the national anthem in response to the abuse by Celtic fans, who were also said to have sung about the Prince’s brother, the Duke of Sussex.

Despite the behaviour of Celtic fans, the national anthem was heard on the streets of Birmingham, and there were at least three "God Save The King" flags outside Villa Park and a St George’s Cross with a picture of the monarch, the outlet reports.

At last summer’s European Championship, Scotland fans were filmed also chanting on the streets of Dusseldorf ahead of a visit by the Prince of Wales to attend England’s clash with Denmark.

Despite the rollercoaster of emotions watching his favourite team, William was in high spirits as Aston Villa eventually beat Celtic FC 4 - 2 on Wednesday evening.

The heir to the throne was spotted among the crowd looking ecstatic as he celebrated after Ollie Watkins scored the third goal.

Wearing a dark blue jacket, and what looked like a dark jumper and light shirt underneath, the royal seemed focused as the match went on.

On January 15, William enjoyed a pint with fellow Aston Villa fans when the footie fanatics met up before a mid-week match. The heir to the throne asked his club to arrange the gathering with some die-hard supporters in the city centre just hours before Aston Villa took to the pitch against Everton.

During an appearance on the 'That Peter Crouch Podcast; five years ago, William said he was the first to become a passionate football supporter in a Royal family whose sporting interests almost exclusively revolved around horses.