Prince Louis may only be at King Charles III’s coronation for a short time.

While the mischievous 5-year-old was present for the beginning of Saturday’s ceremony with his family, Page Six is told that a nanny could whisk him away if he grows tired or misbehaves.

Louis walked into Westminster Abbey in London alongside his parents, Prince William and Kate Middleton, and his older sister, Princess Charlotte.

The little one — who made headlines for his antics during Queen Elizabeth II’s Platinum Jubilee last year — stood next to his mom as she continued to look down and monitor him throughout the ceremony.

Louis appeared to be on his best behavior as he wore a navy Dege and Skinner tunic, matching slacks and black dress shoes, though he did sneak in several yawns during the historic event.

At one point, Charlotte, 8 — who twinned with her mom in an all-white outfit and headband — held her younger brother’s hand as they walked behind their parents into the church.

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Their older brother, Prince George, was also in attendance, but he arrived separately in a red uniform as one of the king’s Pages of Honor.

It was confirmed earlier this week that all of William and Middleton’s children would attend the service after they were photographed at the dress rehearsal Wednesday.

Prior to that, sources previously told Page Six that the royal family was still deciding whether Louis should attend the momentous occasion.

He was not present at the Queen’s funeral last September after he made headlines for making several funny faces and disobeying his mom at the Platinum Jubilee just three months prior.

Meanwhile, neither George, 9, nor Charlotte’s attendances seemed to be in question since the eldest Wales prince was named on the invitation and the young princess has previously helped keep both of her brothers on their best behavior.