Coleman told press at the 19th National Television Awards that there are "exciting times ahead" for the BBC sci-fi smash.
"[Peter is] great - of course, we all know he's going to be wonderful," said the actress, who plays companion Clara.
"It's been great to get up on our feet and get started - we just seem to have taken off like a rocket."
Doctor Who was named Best Drama at the NTAs, with Capaldi's predecessor Matt Smith also winning the award for Best Drama Performance.
"It's been such a fantastic year... this past year for Who," said Coleman, who accepted Smith's award on his behalf alongside Steven Moffat.
"This is wonderful - to be able to take this back to everybody that is grafting as speak, doing series 8."
Doctor Who will return to BBC One in late 2014.
Doctor Who, Peter Capaldi and series 8: Everything you need to know
Watch Brendan O'Carroll talk to Digital Spy at the National Television Awards about the success of Mrs Brown's Boys below: