Queen Elizabeth II has been married to Prince Phillip for 68 years.
Britain's Queen Elizabeth and Prince Phillip as they arrive to Ascot Racecourse in Britain on June 15, 2016. Reuters / Andrew Boyers

Queen Elizabeth II made her first public appearance Sunday since falling ill in early December. The queen’s husband, Prince Phillip, the Duke of Edinburgh, was by his wife’s side as they attended church together Sunday along with several other members of the royal family, including their grandson, Prince William and his wife, Kate Middleton, according to reports.

The 90-year-old monarch was photographed sitting next to her husband during their car ride to church. It was the first time the queen had been spotted outside the gates of the Buckingham Palace in London, where she lives with Prince Phillip, 95, following health complications that caused her to miss her annual Christmas Day and New Year’s church services.

Elizabeth and Phillip have been married for 68 years. She met and fell in love with Phillip several years before they actually tied the knot when she was just 13 years old. In a letter Elizabeth wrote to author Betty Shew not long before she married Phillip, she said she fell for the prince, who is actually her third cousin, the first time she saw him during a visit to the Royal Naval College in Dartmouth. Phillip was an 18-year-old cadet at the time who was responsible for showing Elizabeth around the campus.

“He joined the Navy at the outbreak of war, and I only saw him very occasionally when he was on leave — I suppose about twice in three years. Then when his uncle and aunt, Lord and Lady Mountbatten, were away he spent various weekends away with us at Windsor. Then he went to the Pacific and Far East for two years,” Elizabeth wrote in a two-page letter dated in 1947, the year Elizabeth and Phillip were wed. "We first started seeing more of each other when Philip went for a two-year job to the R.N Petty Officers School at Corsham - before that we hardly knew each other."

Phillip was born in Greece in 1921, but just one year later his family was exiled from Greece in December 1922 after his uncle, King Constantine I of Greece, was ordered to step down from the throne in September 1922. Phillip’s family relocated to France, however, he was ultimately raised by his grandmother in England after his parent’s split up.