Cristiano Ronaldo is finally off the market. The football star popped the question to his long-time partner Georgina Rodriguez, and did so, with a dazzling oval-shaped diamond. Sharing the happy news with fans, Georgina, flaunted the massive rock on her ring finger, and wrote, “Yes, I do,” read the caption in Spanish. “In this and in all my lives.”The sparkler is estimated to weigh between 25–30 carats. According to reports, the stunning piece is valued between $2–5 million. While the breathtaking sparkler is undeniably among the most extravagant celebrity engagement rings in recent years, it still does not come close to the jaw-dropping prices these Hollywood legends shelled out for their happy ever after. From Grace Kelly, to Mariah Carey, Anna Kournikova to Kim Kardashian, here’s a list of some of the most expensive celebrity engagement rings of all time.Grace Kelly and Prince Rainier III of Monaco When Prince Rainier III popped the question to Hollywood icon, Grace Kelly in 1956, he did so with a 10.47-carat emerald-cut Cartier diamond. At the time, the piece came with a price tag of $4.06 million. With its historical importance and popularity, the ring now has a value of an estimated $38.8 million, making it one of the most expensive rings ever owned by a celebrity.Mariah Carey and James Packer In 2016, billionaire James Packer went down on one knee and presented his lady love Mariah Carey with a stunning 35-carat emerald-cut diamond by designer Wilfredo Rosado. According to reports, the ring was valued at $10 million. Although its current price is unknown, it remains as one of the most expensive rings ever given to a celebrity in recent times.Anna Kournikova and Enrique IglesiasEnrique Iglesias’ romance with tennis star Anna Kournikova was one for the history books and so was the stunning engagement ring he presented her when he popped the question. Interestingly, the singer got engaged to his lady love twice and presented her with two different rings, each one more expensive than the other. The first ring he proposed with was an 11-carat pear-cut pink diamond, which was worth $2.5 million. The second time he got down on one knee to ask Anna to be his wife, was with a radiant-cut yellow diamond, estimated at $5.4 million at the time. Today, that second ring is valued at almost $9 million.Elizabeth Taylor and Richard Burton In 1968, Richard Burton went down it history books when he presented Elizabeth Taylor with the legendary Krupp Diamond. The massive 33.19-carat Asscher-cut stone once owned by actress Vera Krupp was purchased for an estimated sum of $305,000. However, when the diamond sold at Christie’s in 2011, it fetched an astonishing $8.8 million.Kim Kardashian and Kanye WestKanye West went all out when he proposed to Kim Kardashian. While people may have forgotten about his elaborate proposal, it would be a crime to forget the flawless 20-carat emerald-cut Lorraine Schwartz ring he proposed with. The stunning gem reportedly came with a pricetag estimated at $8 million. Beyonce and Jay-Z When Jay-Z popped the question to Beyonce, he gave her a ring fit for a ‘Queen’. The rapper reportedly went down on one knee in 2007 and asked Bey to marry him with a 24-carat emerald-cut diamond by Lorraine Schwartz. At the time, the diamond was worth $5 million and is now valued closer to $7.5 million.Paris Hilton and Paris LatsisIn 2005, Greek shipping heir Paris Latsis proposed marriage to hotel heiress Paris Hilton with a 24-carat canary yellow diamond ring, reportedly worth around $4.7 million. However, the adjusted value of the ring today is valued just over $7 million.Jennifer Lopez and Ben Affleck Jennifer Lopes has picked up more than a handful of engagement rings over the years, however, the ones with the biggest price tags came from her now ex-husband, Ben Affleck. The Hollywood star made headlines when he popped the question to his lady love with a rare 8.5-carat natural green diamond with trapezoid side stones. While the total worth of the ring is still unknown, it is estimated to be worth around $5 million. Lopez’s collection also includes a massive emerald-cut diamond from ex-fiance Alex Rodriguez, valued at $5 million.