Katie Holmes and Alexander Skarsgård's flirting on the set of The Giver was "one of the worst kept secrets" say movie insiders.
The American actress stars alongside Alexander in sci-fi drama The Giver, which filmed last year in South Africa.
The stars apparently hit it off so much, cast and crew couldn't help but notice their friendly behaviour towards one another.
"Their flirtation was one of the worst kept secrets on set. Nobody is surprised that they've been spending time together," an insider told British magazine Grazia.
The film, which also stars Taylor Swift and Jeff Bridges, hits cinemas later this summer and will soon be stopping all over the world for press duties.
The movie insider explains this give Katie the perfect opportunity to spend some more time with the True Blood hunk.
"They really enjoy each other's company. While it's all quite casual at the moment, they are looking forward to spending more time with one another as they promote the film, especially as they are both single," the source added.
Whispers of an on-set fling surfaced last year, with reports suggesting the pair got on "like a house on fire."
Last week marked the two-year anniversary of Katie's high profile divorce from Tom Cruise, with whom she has eight-year-old daughter Suri.
"She's crushing on him [Alexander] big time. He's a bit of a ladies' man and they've spent loads of time on their own rehearsing lines in her trailer. They clicked right from the start and have been spending a lot of time away from the set together," a source previously commented.
"Katie's excuse is that they're playing husband and wife in the movie, but no one is buying it - the attraction between them is so obvious."
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