Nina Dobrev flashes her $100K diamond ring from Shaun White as they attend Prince William event

Nina Dobrev and Shaun White got engaged in late October after five years together.

And on Wednesday, the actress was showing off her $100K oval-shaped 5 carat diamond ring from the sports figure while in a strapless red gown with diamond hoop earrings.

Shaun was dapper in a suit as he looked proud of his new beaming fiancée.

The engaged couple were at the 2024 Earthshot Prize at Green Point Shared Fields in Cape Town, South Africa .

During his visit, The Prince of Wales attended the fourth annual Earthshot Prize Awards and engaged in various environmental initiatives and participated in events held in Cape Town as part of Earthshot Week .

The ring is sizable.

A rep from The Diamond Bank in Los Angeles told DailyMail.com it looks to be about 5 carats and cost about $100,000.

The couple announced their betrothal in a series of Instagram posts, with Dobrev writing: 'RIP boyfriend, hello fiance.'

Nina, 35, and Shaun, 38, shared snaps from the romantic proposal, which saw the actress say 'yes' surrounded by candles and beside an arch of white florals.

'She said YES,' Shaun captioned the post with a diamond ring and eternity emoji. He also shared snaps to his Stories where he wrote, 'Best night of my life.'

The photos showed the moment Shaun dropped to one knee to ask for Nina's hand in marriage as she cupped her mouth in shock.

After accepting his proposal, they shared a sweet embrace with Shaun lifting her off her feet.

Nina's ring shone brightly on her hand.

The massive sparkler is a five carat ring by Lorraine Schwartz, Shaun revealed to Vogue .

Shaun went to extraordinary lengths to make the proposal happen.

After previous plans at proposing fell through, Shaun decided to pop the question in late October at a restaurant called The Golden Swan in New York City.

In the weeks leading up to the proposal, he hid their engagement ring in multiple spots around their home, including the tool shed and sock drawer.

But Nina wasn't feeling well in the days leading up to the proposal and decided to stay in to remain well for an upcoming trip to Africa.

Undeterred, Shaun decided to continue with his proposal plans and arranged for his publicist to send Nina a fake invitation to an intimate CFDA/Vogue dinner with Anna Wintour at the restaurant he planned on proposing at.

Nina decided to go and told the outlet the invitation looked completely real. 'He made the invite look so legitimate,' she said.

The Vampire Diaries actress even had a styling session done ahead of the event which she thought the magazine was covering, but instead was actually all organized by her now-fiance.

But Nina was a few minutes late to the event, prompting some anxiety as she said Vogue events typically straight right on time.

'I was in a panic that Anna's waiting for me,' she shared.

The restaurant was also completely quiet as she arrived - contributing to her concerns of being tardy.

Once she entered the restaurant, however, Shaun and a photographer were the only people inside.

'I went into shock. I just froze and stared at him,' she said, before going into a state of joyful disbelief.

Nina met Shaun at the display and while she admits she didn't recall all the details as she had blacked out, she did recollect Shaun 'said all the right things.'

She said yes and they were joined by friends for caviar and champagne. The celebrations lasted until 1AM.

For the next few days, the couple only shared the news with their inner circle and Nina even removed her engagement ring whenever she left the home.

'I don't want to take it off anymore!' she told the site.

Shaun and Nina have been together since 2019.

Asked about a potential engagement by People last April, Shaun said: 'We're just enjoying our time together right now. No pressure.

'But I told her, I was like, 'Look, after the Olympics, I finally got my freedom to do whatever. And let's just have fun and be together and support each other.'

'But you never know. We'll see what happens,' he continued.