After recently winning Euro 2025 with England, Toone shared images of Bunney's proposal in Spain.
Her United team-mates, who were preparing to take on Manchester City in a pre-season friendly, were quick to congratulate their much-loved colleague.
Melvine Malard commented: "You two are so beautiful."
Captain Maya Le Tissier sent a host of emojis and Millie Turner said: "Best news in the world."
Other familiar faces to wish the couple well were Dame Kelly Holmes who said: "Congrats" and TV celebrity Vick Hope, who sent a series of love-heart emojis.
Bunney popped the question to Toone, whom he has been dating for three years, while the pair were on holiday in Ibiza.