
Jennifer Garner and Ben Affleck —
The actor-turned-award-winning-director declared his love for wife Jennifer Garner with this 4.5-carat gem. 
Beyoncé and Jay-Z —
Jay-Z didn't just put a ring on it -- he went above and beyond for wife Beyoncé with a huge 18-carat diamond ring.
Angelina Jolie and Brad Pitt —
After seven years of dating, Brad Pitt popped the question with this 16-carat custom-designed Robert Procop diamond ring.
Blake Lively and Ryan Reynolds —
Though they managed to keep their engagement and wedding private, there's no way Blake Lively's Lorraine Schwartz diamond can go under the radar.
Sarah Jessica Parker and Matthew Broderick —
One of Hollywood's longest standing marriages started when Matthew Broderick gave Sarah Jessica Parker this beautifully cut yellow gold diamond ring.
Heidi Klum and Seal —
Despite this gorgeous yellow 10-carat engagement ring (given to Heidi Klum on top of a glacier!), Klum and Seal's marriage sadly ended in 2012.
Jessica Biel and Justin Timberlake —
Justin Timberlake proposed to longtime girlfriend Jessica Biel with this vintage-inspired six-carat diamond.
Victoria Beckham and David Beckham —
Soccer star David Beckham sealed the deal with wife Victoria Beckham with this massive diamond-encrusted engagement ring. 
Katie Holmes and Tom Cruise —
Katie Holmes's five-carat oval-shaped engagement ring from ex-husband Tom Cruise is definitely a stunner for the books.
Prince William and Kate Middleton —
Formerly belonging to the late Princess Diana, this 18-carat sapphire diamond may just be the most famous engagement ring in the world.
Jennifer Aniston and Justin Theroux —
Justin Theroux popped the question to Jennifer Aniston on his 41st birthday with the help of this massive sparkler.
Portia de Rossi and Ellen deGeneres —
Ellen DeGeneres famously proposed to Portia de Rossi in 2008 with a three-carat Neil Lane diamond ring while they were both tending to a pet goldfish.
Kelly Clarkson and Brandon Blackstock —
The recently engaged Kelly Clarkson said "yes" after she was presented with this huge yellow diamond ring.
Gwen Stefani and Gavin Rossdale —
Gavin Rossdale designed this unique diamond-studded gold ring before proposing to Gwen Stefani in 2002. 
Brooke Shields and Chris Henchy —
With this Neil Lane antique platinum and gold engagement ring, no wonder Brooke Shields has been happily married to Chris Henchy for over a decade.
Chris Martin and Gwyneth Paltrow —
With a square-cut diamond ring, the Coldplay frontman declared his love for Gwyneth Paltrow.
Reese Witherspoon and Jim Toth —
Jim Toth secured his spot in Reese Witherspoon's heart with this four-carat stunner. -- See even more celebrity engagement rings at Elle.com