The singer apparently sent flowers to the EastEnders star last weekend to wish him luck ahead of his debut performance on the show.
"Adele sent Sid a huge bouquet of flowers before his first performance last weekend. It came with a good luck card telling him he was going to 'sweep the board'," a source told the Daily Star.
"She also sent him a string of text messages saying she was glued to the show. Adele thought his waltz was amazing, and honestly reckons Sid can go all the way and win the competition.
"Adele and Sid have a really jokey relationship. She wasn't expecting him to be such a whizz on the dance floor."
Adele's fiancé Simon Konecki is best friends with Owen, who supports his Drop4Drop fresh water charity.
Photo gallery - Strictly Come Dancing show two: