The Krrish 2 actor married the Bangalore-based Brit in August 2010.
He told The Times of India: "Ours is a turbulent industry. There's so much criticism and so many ups and downs! Whenever I feel turbulent inside, Priyanka makes me feel calm within the chaos.
"I am madly in love with her and thank God for gifting me such a lovely wife. Sometimes, when I leave home late at night for shoots and she is asleep, just looking at her face makes me feel reassured and brings a smile on my face.
"In fact, she had flown down recently during our anniversary."
In February, the 36-year-old admitted that he did not believe in true love until he met Alva.
Oberoi announced in the summer that he and his wife are expecting their first child in February or March.