23 of the most expensive celebrity engagement rings of all time

This $500,000 heirloom might not be the most expensive ring on the list, but it's sentimental value is worth so much more. Princess Diana also wore this ring while she was engaged to Prince Charles.

It's worth approximately $1 million and even has some sentiment to it thanks to the fact that Theroux called on her good friend Jennifer Meyer to help design it.

The solitaire ring, which features side baguettes set in platinum, is worth $750,000. For someone who never thought they'd get married, Clooney sure did splurge.

The center diamond is the only one on the platinum ring, which means it rightfully gets all the attention. This stunner is said to be worth $1 million.

Douglas did pretty good with this $1 million ring and their relationship isn't so bad either. The actors have been together for over 16 years.

The ring, which was designed by Brad and jeweler Robert Procop, is now a divorce diamond thanks to the couple's split in 2015. The divorce isn't final yet so who knows which one will walk away with the estimated $1 million ring.

The center oval diamond is surrounded by another six carats worth of diamonds and has been estimated to cost anywhere between $275,000 and $1.5 million.

The couple split in 2012 when Katie started worrying that Tom would send their daughter Suri to a strict scientology camp and the diamond hasn't been seen since.

Kate's left ring finger dazzled on the 2016 Met Gala red carpet, where she officially announced her engagement to Detroit Tigers baseball player Justin Verlander with the $1.5 million ring.

The unique, yellow diamond is set in platinum and has two other diamonds on either side. The real kicker here is that this may be her second engagement ring. The tennis pro was spotted with an insane 11-carat, pear-shapedpink diamond back in 2001 which was easily worth up to $2.5 million dollars.

These days she has mostly spotted with the yellow one paired with an equally impressive wedding band.

There are quite a few rumors surrounding this infamous divorce diamond. For starters, it was said that the ring was worth nearly $2 million at one point but in 2013 when Humphries auctioned it off at a charity event, it only went for $749,000.

The craziest report, however, is that it was actually Kardashian who bought the ring in the first place, not Humphries. Why he was the one who got to keep it in the end and earn the profits off of the auction, no one may ever know.

The massive ring is estimated to be worth at least $2 million, outshining Future's purchase by a whole carat and at least half a million.

The center diamond was surrounded by 58 smaller pink diamonds and two half moon diamonds leading it to cost upwards of $2.5 million dollars.

The beautiful ring was given to her by her equally beautiful hubby, Ryan Reynolds, who had to have dropped at least $2.5 million on it.

The emerald cut diamond sits between two smaller diamonds and was designed by London Jeweller Graff. It's worth close to $3 million, which is practically pocket change for the family.

The couple announced their engagement at Vanessa's 18th birthday party in 2001, but the rock she sports these days was given to her in 2003.

Some claim that the $4 million item is just an "apology ring," but she wears it proudly on her left finger almost daily.

After her failed engagement to Ben Affleck, she gave the $2.5 million sparkler back. However, this ring, which is estimated to cost over $4 million, might've been sold according to rumors that started to spread after the couple's split back in 2011.

Sources reported that she was going to sell all the jewelry and clothing he bought for her over the years, but if that ever did happen it was kept under wraps.

The $4.3 million ring goes on tour along with other accessories and mementos in the traveling exhibition "From Philadelphia to Monaco: Grace Kelly Beyond the Icon."

The flawless, cushion-cut diamond sits on a thin platinum band with micro-pavé diamonds and was created by Lorraine Schwartz, who also made the original 15-carat engagement ring.

When this upgrade first appeared on the reality star's finger after Kanye closed a deal with Adidas, it was rumored to be worth $8 million. However, since the theft, lawyers and police officials have clarified that it's actually worth closer to $4.5 million.

If the ring is recovered, she might not dare to wear it again. Lately she's been sporting a new ring that's a bit less flashy.

The hotel heiress never made it down the aisle and stopped wearing the $4.7 million rock just four months after they initially announced their engagement.

Jay-Z gave her the center diamond set on a split shank band with micro-pavé diamonds in platinum. It set him back $5 million to finally put a ring on it.

The jaw-dropping $8.8 million ring was created by Elizabeth herself after Richard Burton, her 5th (and 6th) husband, bought the diamond for her at an auction. After setting it in platinum, she wore the ring every single day for the rest of her life.

Sadly, not even the most expensive engagement ring in Hollywood can help a couple live happily ever after. The wedding was called off after seven months. Luckily for Mariah, she legally gets to keep the $10 million ring since James was the one who broke it off.