Michael responded to her engagement post in the comments, writing: 'Love you honey.' He also proudly announced the joyous news on his Instagram page using the same photo.
'It has been an honor to celebrate many milestones, historic occasions and create memories with my family here at the White House, none more special than my engagement to my fantastic fiancé Michael!' she wrote, while sharing an image of the happy couple at the White House.
'Got engaged to the love of my life! Her father is in the process of leaving the White House for his last time as America prepares for the swearing in of President-elect Joe Biden. The timing if the announcement was notable considering it is her father's last full day in office. Looking forward to our next chapter together, ' he captioned the image.
Michael, 23, also posted the same photo on his own Instagram account, with the caption: "Got engaged to the love of my life!"
Boulos has shown great support over the years for her fiancée's father and 45th president of the United States.
Tiffany Trump and Boulos have flown under the radar in comparison to the president's older children whom he shares with ex-wife Ivana Trump: Don Jr., 43; Ivanka, 39; and Eric, 37.
Trump also made multiple stops as a campaign surrogate in the weeks before the election.
If you've also been wondering who Michael Boulos is, here is what we know about him. "Celebrating God's endless blessing of love", she penned. The mom told Town & Country in 2020, "I adore Michael!"