The Queen joined Tom Cruise and Helen Mirren at a glitzy royal event at Windsor Castle to mark her 70 years on the throne

• Celebrities like Tom Cruise and Helen Mirren joined the Queen at a Windsor Castle event on Sunday.
• The monarch was all smiles at the equestrian show celebrating her 70th year on the throne.

Queen Elizabeth II was in good spirits while attending a Platinum Jubilee event at Windsor Castle on Sunday to mark her 70th year on the throne.

The 96-year-old monarch was pictured socializing with fellow attendees of the final evening of a four-day Royal Horse Show titled "A Gallop Through History." For the outdoor occasion, she wore a baby-blue gown, a sequined grey shawl, and accessorized with a small black handbag.

Each day of the event saw over 500 horses and 1,000 performers put on a 90-minute show, according to the official ticket website. On the final evening, the Queen's granddaughter, Lady Louise Windsor, rode Prince Philip's carriage as part of the show.

According to Reuters, the Queen arrived in a Range Rover. Upon exiting the vehicle, it was evident she was using a walking stick to help her move around.

Sunday marked the second time in three days the Queen made a public appearance using her walking stick. As previously reported by Insider's Mikhiala Friel, the monarch's attended The Royal Horse Show on Friday, which was the first time she'd been seen out in public in weeks. It was also three days after she was represented by Prince Charles at the State Opening of Parliament, which she had to pull out of due to "mobility problems."

On May 9, a spokesperson for the monarch confirmed that she "continues to experience episodic mobility problems."

Nonetheless, she appeared to be all smiles on Sunday at the glitzy event, which welcomed an array of celebrity guests including Tom Cruise and Helen Mirren.

Mirren, who played the monarch in the 2006 film "The Queen," ended the show dressed up as a Queen Elizabeth I. According to People, Mirren's final line on stage was: "For all these years you have carried our nation and have been its heart and drumbeat. Our sincere and most loving thanks."

Meanwhile, Cruise, whose movie "Top Gun: Maverick" is set for a May 27 release, was a presenter at the show and was surrounded by fans as he decided to walk to the studio in Windsor, according to "This Morning" host Philip Schofield, The Mirror reported.

Schofield interviewed Cruise live on air and said the Hollywood actor "caused absolute chaos in Windsor."