By Sarah Parish thinks that the BBC didn't want to take the risk on a third series of Atlantis because it was an expensive show that didn't get a mass audience immediately.
The show was axed in January ahead of the broadcast of the second half of its second series.
"It's very sad," Parish - who plays Pasiphaƫ in the fantasy adventure - told Metro of the cancellation.
"The programme was cancelled because it was expensive to make and because it didn't get a huge audience straight away, so I think it was a risk the BBC didn't want to take."
She added: "I feel sorry for the fans because we had quite a big following. They were loyal and very upset when they found out the programme had been cancelled.
"It was an exceptionally good format but it was a children's show really and we were put on at 8.30pm, which is late for kids, plus we were up against The X Factor."
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The final seven episodes of Atlantis began airing earlier this month.
The show's co-creator Johnny Capps has said it was "unfair" to axe the show before its second series had finished airing.
Actor Jack Donnelly has said that he was "gutted" about the cancellation, adding that the job was "the greatest thing that's ever happened to [him]".
