ET has confirmed that Cowell, who shares a son with Silverman, popped the question on the beach on Christmas Eve.
Simon Cowell is engaged to his longtime girlfriend, Lauren Silverman, ET has confirmed.
A source tells ET that the proposal happened when the pair were in Barbados on vacation for the holidays with the couple's 7-year-old son, Eric, and Silverman's eldest son, Adam, 16.
"Simon proposed to Lauren on their Barbados vacation over the holidays in front of their son Eric and Lauren's son Adam," the source shared. "Lauren was so surprised and didn't expect Simon to propose, because Simon previously never thought he was the marrying type. He changed his mind because he realized met his perfect match."
The proposal was an emotional one for Silverman who the source revealed "said yes immediately,"
"Lauren burst into happy tears when Simon proposed and said yes immediately," the source added. "Lauren has been Simon’s rock and supports him unconditionally. They are both so happy and love each other so much. The proposal was a natural next step."
The pair went public with their relationship in 2013 and welcomed their first child together, Eric, in February of 2014.
"Mum, Dad and Eric. Now two days old," the America's Got Talent judge shared in a sweet post announcing Eric's arrival.
"I never knew how much love and pride I would feel," he added. "Lauren in great shape. Thanks for all your kind messages."
Cowell spoke about his relationship with Silverman while receiving a star on the Hollywood Walk of Fame in 2018, calling her his "rock."
"Lauren, you've been my rock for the past few years, put up with everything I put up with," he said at the time.
He also spoke about his late parents, and their son, Eric, whom he said may also find himself on the Walk of Fame one day.
"I have a feeling they are looking down and now I can look over to my son, Eric, and say, 'Maybe one day you will get one of these as well,'" an emotional Cowell added.