The Russian pro confirmed during VT footage last night that he is to begin dating the ex-EastEnders actress when they finish working together on the reality series.
"When you are dancing there are going to be stories and rumours," he said. "People say, 'What's going on with these two?' It's complicated.
"When you go home with the person you love, it's one thing. When you go practice and go to work, it is another thing. If you mix the things together, it is a lot more complicated."
He added: "That's fine. I'm waiting for Strictly to be over... It is going to happen after the show is over. I'm confirming the rumours."
Tointon and Chigvintsev scored 38 points for their tango on last night's show.
The Strictly results show airs this evening at 7.30pm on BBC One.