TVNZ's flagship current affairs show Sunday will run a mixture of one hour and half hour episodes in 2013 following the success of the current Sunday night TV ONE line-up.
The Sunday night combination of ONE News at 6, followed by Sunday and NZ's Got Talent has proven to be a winning mix of current affairs and entertainment for TV ONE's viewers.
TVNZ says viewership of Sunday has grown significantly, and NZ's got Talent has been the highest rating local show in the last 10 years.
Chief executive Kevin Kenrick said Sunday's viewership had grown significantly since the new line-up was introduced.
"When we placed Sunday at 7pm and reduced the length to fit in the season of NZ's got Talent, there was some concern that this might damage Sunday's viewership," said Kenrick.
"In fact the opposite has happened and Sunday's viewership has improved by more than 30%. The combination of news, current affairs and big entertainment has been a hit with our viewers."
TVNZ will run more episodes of Sunday next year so the total air time allocated to the programme remains the same. Staffing and resources remain the same as well.
Kenrick said TVNZ's commitment to long-form current affairs will be greater in 2013, with financial investment in current affairs expected to increase by nearly a third.
"Our news and current affairs programmes and our entertainment programmes are mutually dependent - to maximise the success of both we must be flexible and tailor our schedule to what works for viewers, and Sunday night has been a fantastic example of this."