On Tuesday evening, November 13, 2018, the Magic Mike star took to Instagram to gush over his reported girlfriend after attending the "Bang Bang" singer's sold-out concert at the Royal Albert Hall in London.
"I wanted to write this song for myself in my moment of pain and sadness, but also to give myself joy, to give other people something that they can listen to in the moment when it gets really hard", she said on stage.
In an Instagram Story posted earlier in the evening, he filmed the crowd rocking out to the show, writing, "She went off tonight" across the video.
Tatum's new relationship comes on the heels of his divorce from Jenna Dewan.
"Magic Mike London Opening night", the singer captioned a photo shared to her account, adding a string of emojis including the eggplant and flexed biceps. Congratulations @channingtatum, what a show.
And this wasn't the first Jessie J show for Tatum, either.
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Tatum and Dewan, who have a five-year-old daughter, Everly, split in April after nine years of marriage.
News of the couple's romance broke in early October, when they were seen on a mini-golf date, but neither has yet to publicly confirm the rumors.
"Channing wants to do nothing but support Jessie J in every way", the source says.
Dewan also has a new man in her life, opening up recently to Us Weekly about how "happy" she feels with Shameless actor Steve Kazee. "He flies all over the U.S.to attend her concerts".
Comparisons were immediately drawn between Jessie and Jenna when reports that Channing was dating the British musician completely caught us off guard last month. The "Bang Bang" singer reportedly addressed her audience during her Rose tour gig at the Royal Albert on Tuesday night and revealed her secret health struggles.