The star told TV Choice that he is yet to be approached about a possible role in the sci-fi drama's 50th anniversary celebrations.
"I haven't heard anything," he admitted, when asked about reprising his role as Captain Jack Harkness.
"There was a rumour online that said I'm not able to do it because of my schedule. But, actually, I haven't been asked. So it's nothing to do with my schedule."
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Barrowman added that he is keen to film more episodes of both Doctor Who and its spinoff series Torchwood.