The Crossroads actress winked at the camera, kissed her fiancé, and covered her mouth in the sweet clip.
Sam's manager Brandon Cohen shared the engagement news in an additional statement.
Brandon mentioned he was "proud to celebrate and confirm the engagement," according to .
"The couple made their long-standing relationship official today and are deeply touched by the support, dedication and love expressed to them.
Brandon concluded that Sam "couldn't be happier to be involved and make this one-of-a-kind ring."
Britney's ring was designed by Forever Diamond of New York jeweler Roman Malayev.
Most read in The Sun
'THE BRITNEY'
On their , Forever Diamond congratulated the two and stated: "The thought and detail Sam put into this ring made the design process so special for Roman and our team.
"In honor of the Lioness herself, we are naming this gorgeous setting ."
The diamond company added: "Sam and Britney, we wish you a lifetime of happiness together and are honored to welcome you to the Forever Diamonds Family."
THE 'LIONESS'
Fans speculated that her boyfriend was about to propose after he shared and quickly deleted a photo of a diamond ring.
Taking to Instagram stories on Friday, fitness model Sam shared a photo of a stunning engagement ring with the inscription "lioness" - his nickname for Britney.
Before fans could get too excited, the model deleted the photo and then claimed that he was hacked.
Soon after, he shared another post with the explanation: "Account got hacked and was photoshopped - calm down everyone!"
But it was already too late, as fans had flocked to Sam's page and left comments under his latest modeling shot to express their delight.
"Congrats!" said one comment while another person wrote, "Changing the topic I see [ring emoji]."
Another fan stated: "You and Brit are gonna have some beautiful babies."
SHOPPING FOR RINGS
Fans anticipated a proposal as Sam was earlier this month, hinting that he was ready to get down on one knee.
Britney expressed her desire to get married as she gave emotional testimony during a hearing for her conservatorship battle in June.
She pleaded with a judge to end the arrangement and said it was "doing me way more harm than good."
She told the court she wants to marry her boyfriend and have a baby, but that the conservatorship would not allow it.
She claimed she had to use birth control to prevent her getting pregnant, and couldn't have her IUD removed by a doctor.
She told the court: "All I want is to own my money and for this to end and for my boyfriend to be able to drive me in his car."
Britney recently won a major victory in her conservatorship battle so she could get married after years of being banned from doing so.
Her father Jamie officially filed end his time as her conservator after about 13 years of having control over her estate and personal matters.
VICTORY FOR BRIT
Jamie asked the judge to terminate the conservatorship without another mental evaluation.
previously said that she did not want to undergo a mental evaluation while testifying in court back in June.
Sources told the outlet that Jamie made the decision to end the conservatorship due to public pressure, as well as the pressure put forth by Britney's attorney Mathew Rosengart.
Additionally, insiders said the Toxic singer's view of her father and their relationship has not changed despite the filing.
Britney is believed to still be extremely angry at him over his role in the conservatorship.
The singer's next court appearance will take place on September 29, where she planned to the issue of termination to be front and center.
It was previously reported that the purpose of the next hearing will be to discuss Jamie's involvement in the conservatorship.
JAMIE FILES
Jamie, 69, recently to Superior Court on.
The paperwork stated that the singer "is entitled to have this Court now seriously consider whether this conservatorship is no longer required."
Additionally, the filing claimed 's circumstances have changed "to such an extent that grounds for establishment of a conservatorship may no longer exist."
"As Mr. Spears has said again and again, all he wants is what is best for his daughter," the document stated.
"If Ms. Spears wants to terminate the conservatorship and believes that she can handle her own life, Mr Spears believes that she should get that chance."
READ MORE SUN STORIES
Judge Brenda Penny, who oversaw the case, will need to approve the move.
Britney’s attorney, Mathew Rosengart, told The Sun, regarding Jamie's petition: "It appears that Mr. Spears believes he can try to avoid accountability and justice, including sitting for a sworn deposition and answering other discovery under oath, but as we assess his filing - which was inappropriately sent to the media before it was served on counsel - we will also continue to explore all options.”
We pay for your stories!
Do you have a story for The US Sun team?
Email us at [email protected] or call 212 416 4552.
Like us on Facebook at and follow us from our main Twitter account at