The 21-year-old made the announcement while sharing a picture of Arthur giving her a piggyback ride in a photo diary documenting her Stanford University graduation for Nylon magazine.

Phoebe's pic, captioned "My boyfriend, Arthur, giving me a lift post-ceremony," instantly captured the attention of fans and followers. The couple also shared another candid snapshot from the evening, showing them cuddling up together as Phoebe couldn't help but gush about how Arthur "cleans up nicely."

Rumors of Phoebe and Arthur's romance first began swirling in October 2023, after they posted an Instagram photo from their trip to Paris. Their relationship seemed to gain further momentum when they attended the premiere of "Feud: Capote vs. The Swans" earlier this year. However, when asked about their relationship status in a March 2024 Bustle interview, Phoebe declined to comment.

Phoebe Gates, the youngest of Bill Gates' three children with ex-wife Melinda Gates, is no stranger to the public eye. With her own accomplishments, including graduating from prestigious Stanford University, Phoebe has garnered attention for her achievements in various fields. Meanwhile, Arthur Donald is the eldest son of Mary McCartney and her former husband, TV producer Alistair Donald.

As Phoebe and Arthur's relationship continues to blossom, fans and followers eagerly anticipate more updates from the couple. Their connection, bridging two prominent families, has only fueled the curiosity and admiration of those who are intrigued by the union of wealth, talent, and legacy.

It remains to be seen how their individual paths will converge, but one thing is certain: the relationship between Phoebe Gates and Arthur Donald has now been cemented in the public eye, ushering in a new chapter in both of their lives.