Kate Middleton's brother, James Middelton, makes new girlfriend Instagram official: Photo!

James Middleton has made it Instagram official with his girlfriend!

About a year after Kate Middleton's younger brother started dating French financial analyst Alizee Thevenet, he took to social media to share a photo of himself with the blonde beauty for the first time.

"Sail away with me," he captioned a sun-filled shot of them smiling on a boat while wearing matching sweaters. He's also wearing a hat with her first initial, "A," on it.

SEE ALSO: Who is James Middleton's new girlfriend? Here's what we know

The 32-year-old Middleton reportedly started dating Thevenet early last summer after meeting at a bar, and they were first photographed together in December. Oner month later, photographs of the couple on the beach went viral during their family vacation with the Middletons in St. Barts.

Thevenet's father, Jean-Gabriel Thevenet, spoke to the Daily Mail about his daughter's exciting new romance, and confirmed that "they are very much in love" with one another.

"My daughter Alizee is very happy with James," he added. "James is a very charming man. I am very happy that Alizee is together with James. I know she is very happy. We keep our fingers crossed for them. I am not to say how they met, to give away their secrets. You must talk to her or James, they will be back in London soon, but I’m very happy for them."

Middleton's romance follows a tumultuous five-year relationship with "Dancing on Ice" star Donna Air came to an end in February of last year.

James Middleton is the youngest of Michael and Carole Middleton's three children. He has two older sisters, Kate, 37, and Pippa, 35. Kate, of course, married Prince William back in 2011, while Pippa married James Matthews in 2017.