The handsome actor, 55, revealed the details of his sweet anniversary celebrations while appearing at the Motion Picture Television Fund's benefit in Los Angeles at the weekend.
"And they said it wouldn't last," he joked when asked how he marked the special occasion by Entertainment Tonight. "Ah, we proved them wrong!"
"We mostly drank," he added. "I [made] dinner and we had a nice, a very romantic second anniversary. It was very civilised."
George Clooney celebrated two years of wedded bliss with his beautiful wife Amal by cooking her a romantic dinner
The couple, who reportedly met through mutual friends in 2013, tied the knot in a lavish, star-studded wedding in Italy on September 27, 2014.
Beirut-born, Oxford University-educated Amal is a member of Doughty Street's international law team and has a high-profile client list.
She has advised former U.N. Secretary-General Kofi Annan on Syria and has represented WikiLeaks founder Julian Assange during his fight against extradition to Sweden.
Meanwhile, Clooney - whose recent films include Money Monster and Hail, Caesar!, is one of Hollywood's most powerful actors, directors and producers.
"And they said it wouldn't last," he joked when asked how he marked the special occasion
Earlier this year, the actor spoke about the moment he popped the question in April 2014 after six months of dating.
During an appearance on The Ellen DeGeneres Show, George admitted that he and Amal hadn't talked about marriage before he decided to propose, but he "plotted the whole thing out" nonetheless.
"Everything was planned out and I've cooked dinner. And she comes in and she's just come back from London," he explained, adding that he had planned to propose with song Why Shouldn't I playing in the background.
The couple tied the knot in a lavish, star-studded wedding in Italy on September 27, 2014
"I've got it all set up, timed out and the song is coming and she gets up to go wash the dishes, which she's never done. And I'm like what are you doing and she comes back in. And finally I said ya know, I blew out the candle and I said 'I think the lighter's in the box behind you'," he continued.
"I got down on my knee and said, 'I couldn't imagine spending the rest of my life without you.' And she kept looking at the ring and she was looking at me and she was like 'Oh my God,'" the actor said.
"Finally I literally said, 'Look, I hope the answer's yes, but I need an answer. I'm 52 and I could throw out my hip pretty soon'. And she said, 'Oh, yes' and it worked out really well."