American singer-songwriter Britney Spears is on cloud nine.

This after Britney proudly shared on Instagram her latest milestone.

Apparently, Britney's long-time partner, actor Sam Asghari, has proposed to her.

"I can’t f*cking believe it," said Britney, along with the video of her flaunting her four-carat diamond engagement ring.

The comment section was filled with congratulatory messages.

American personality Paris Hilton welcomed Britney to the "club."

"Congratulations love!! So happy for you! Welcome to the club!" it read.

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The company behind the engagement ring also extended its message.

"Our team couldn’t be more thrilled to congratulate @britneyspears and @samasghari on the beginning of their Forever," they wrote, along with the detailed video of Britney's ring.

"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 Britney," they added. "Sam and Britney, we wish you a lifetime of happiness together and are honored to welcome you to the Forever Diamonds Family."

Last August, Britney penned an appreciation post for Sam.

In there, the pop star noted how the latter has been with her through both the hardest and the best years of her life.

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#samasghari

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