Comedian Aziz Ansari has responded to allegations of sexual misconduct by a woman he dated last year.

Ansari said in a statement Sunday that he apologised last year when she told him about her discomfort during a sexual encounter in his apartment he said he believed to be "completely consensual".

The woman, in an interview with Babe.net, says she was furious when she saw Ansari was wearing a "Time's Up" pin while accepting a Golden Globe on 7 January.

She said it brought back memories of him assaulting her after a date in his apartment.

The next day, the woman says she texted Ansari letting him know that she was upset with his behavior. Ansari then apologised.

In a statement from his representative, Ansari responded to the allegation: "In September of last year, I met a woman at a party. We exchanged numbers. We texted back and forth and eventually went on a date. We went out to dinner, and afterwards we ended up engaging in sexual activity, which by all indications was completely consensual.

"The next day, I got a text from her saying that although “it may have seemed okay,” upon further reflection, she felt uncomfortable. It was true that everything did seem okay to me, so when I heard that it was not the case for her, I was surprised and concerned. I took her words to heart and responded privately after taking the time to process what she had said.