EXCLUSIVE: A royal expert has responded to the Celtic fans' chants of ‘Lizzie's in a box" and 'If you hate the Royal Family, clap your hands'.

Celtic fans display anti-royal banners in front of Prince William - The Prince of Wales was at Villa Park as the team beat Celtic to qualify for the Champions League last-16

Prince William watched his beloved Aston Villa play Glasgow Celtic from Scotland in Birmingham, England on Wednesday, Jan. 29

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.

Champions League match between Scottish champions and Aston Villa became a contest between republican and royalist supporters

Prince William experienced a night of high drama at Villa Park as his beloved Aston Villa secured a thrilling 4-2 victory over Celtic in the Champions League on Wednesday evening. The Prince of Wales was among the passionate supporters watching the Birmingham side continue their European campaign with an impressive win against the Scottish

Prince William was forced to cancel a royal visit to the Army Air Corps on Jan. 16 at the last minute. Kensington Palace said the Prince of Wales 'sends his sincere apologies' over the cancellation in a message.

Prince William received delightful news after Princess Beatrice and her husband Edoardo Mapelli Mozzi announced daughter’s birth.On Wednesday, the Prince of Wales made first public appearance to watch Aston Villa's game against Celtic

Like any football fan, William was seen expressing a multitude of emotions as he watched his beloved team play. Ranging from despair to jubilation, the Prince of Wales was seen reacting to every missed chance and goal scored during a thrilling game, which saw Villa clinch a 4-2 win.

The Prince of Wales appeared to be in high spirits tonight as he cheered on Aston Villa during a UEFA Champions League match against Celtic FC in Birmingham

Prince William managed to make it to Aston Villa's at the Champion's League – and it was clear that the royal was experiencing a multitude of emotions as he watched his beloved team play

Prince William, 42, was spotted in the stands at Villa Park in Birmingham looking tense as Aston Villa took on the Scottish side, before celebrating the English team's 4-2 victory over Celtic.