Jill Biden may attend the coronation of King Charles III next month solo as President Biden still does not plan to be there.

Biden is “not expected” to join dozens of heads of state at the May 6 event, sources told The Telegraph while touting his “strong” relationship with the monarch.

The 80-year-old commander in chief will likely send a delegation in his place that may include his wife as he has other commitments, the outlet reported.

An anonymous White House official told Time Magazine last month that the king’s coronation “does not feel like an event Joe Biden will attend.”

Buckingham Palace has already emailed coronation guests with some asked to RSVP to the palace by Monday.

Heads of state from Ireland, France, Spain, Belgium, Japan, Hungary and Monaco are expected to attend along with all three presidents of the EU — Ursula von der Leyen, Roberta Metsola and Charles Michel.

Newly elected Scottish First Minister Humza Yousaf said he will attend despite not being a fan of monarchies.

Dame Karen Pierce, the British ambassador to the US, and Buckingham Palace aides have had “cordial and diplomatic” talks with the White House about the coronation and have been told that Biden, who went to the funeral of Charles’ mother Queen Elizabeth II, has other engagements scheduled at the time the coronation will be held.

Biden may meet King Charles in Northern Ireland during his day-and-a-half visit on April 11.

However, Bob Seely, a Conservative MP on the foreign affairs select committee, said the White House had made a “foolish decision” and urged Biden to reconsider.

“It seems pretty remiss, and I’m tempted to say more fool him for not coming,” he told the Telegraph. “This is a once-in-a-lifetime event, and you would have thought he should come because he’s a head of state.

“If I was the president of the United States, I would come to the Coronation of the King of England – there’s no two ways about it. It just seems to be a foolish decision.”