has never been shy about his admiration for wife — and even claims they’ve never had a single argument throughout their 11 years of marriage — as a source exclusively tells In Touch he’s picked up all of the happy wife, happy life habits that keep his relationship in tip top shape from business partner , who is proud to say he’s enjoyed one of the most rock-solid marriages in Hollywood for the past 26 years.

“People scoff at George’s claim that he and Amal don’t fight,” the insider says, “but it’s actually true and is something Rande taught him.” 

The ER alum, 64, goes back over 20 years with Rande, 63. From launching business together, including the lucrative Casamigos Tequila brand they began in 2013 and then sold just four years later for $1 billion, to building homes right next to each other, the BFFs are intimately familiar with each other’s love lives, with the source noting George pays keen attention to how his pal and wife resolve disputes. 

“Rande and Cindy don’t fight either, that doesn’t mean they always agree, but instead of digging in his heels 90 percent of the time Rande just gives in,” the insider explains. “He truly lives by the happy wife, happy life motto and all of George’s years palling around with Rande and Cindy has taught him to take the same approach in his marriage.” 

In addition to rolling over whenever necessary in the name of peace, the Ocean’s 11 star has also taken note of Rande’s efforts to keep his supermodel wife interested in him sexually.

“Rande also works hard to keep the spark alive,” the source reveals. “They have separate bathrooms, which sounds very small, but it actually goes a long way to keeping a bit of mystery. George has followed that advice as well.” 

Amal, 47, an accomplished human rights lawyer, tied the knot with the Batman & Robin star during a star-studded Italian ceremony in September 2014. Despite a few semi-long term relationships, the hunky actor was known in the industry as quite the playboy prior to settling down. His wife’s never publicly admitted to any jealousy and the insider actually says George is the one ignoring intrusive thoughts of her being “around plenty of high powered men all the time through work,” for the most part. Though when it comes to Rande and Cindy, 59, communication is key to even approaching the subject, which is something Amal’s A-list hubby is also looking to copy.

“Cindy is the most beautiful woman in the world, in order to keep her happy Rande had to totally put any jealousy to bed,” the source reveals, detailing that the couple “give each other a lot of rope.” 

“There’s an inherent trust because neither of them give in to jealousy,” the insider adds. “They talk things out.” 

So far, “George has done the same with Amal,” which is difficult because “she’s stunning,” but “George never questions it and she gives him the same trust back.”