Presenter Radzi Chinyanganya will leave Blue Peter after spending five and a half years on the children's programme.
The 32-year-old was the show's 37th presenter, when he replaced Helen Skelton in October 2013.
He announced the news last night on Instagram, describing his time on the show as "a genuine childhood dream come true".
"I'll always be grateful for the experiences I've had, the people I've met and the relationships I've made,"
"I will undoubtedly miss being part of the show, but all good things must come to an end," he added.
CBBC also revealed the "sad news" in a statement on Twitter last night, writing that the presenter will be leaving in April.
"Radzi has been a great presenter on the programme," they wrote.
Sad news on tonight's #BluePeter and that is that @iamradzi is leaving the show. Radzi has been a presenter on the programme for five and a half years and he will be greatly missed...but we still have him on our screens until he leaves in April! 💙😢 pic.twitter.com/06VE4f6L1c— CBBC (@cbbc) March 21, 2019
His co-presenter Lindsey Russell said: "I'll miss him... ❤️"
We’ve been strapped to wings of planes together, raced in ice go-karts, met Royals, done mud runs with the Marines...— Lindsey Russell (@Linds_bluepeter) March 21, 2019
But I think we can all agree we peaked in a field in February 2017 as we stripped for @sportrelief
We’ve had some unreal times on this show. I’ll miss him... ❤️ pic.twitter.com/4iv6Wna2gU
Fans also expressed their sadness across social media:
OMG RADZI IS LEAVING BLUE PETER IM BALLING— 𝕥𝕒𝕤𝕙🥥 (@breathewyatt) March 21, 2019
One fan called Chinyanganya a "brilliant and iconic" addition to Blue Peter, that will "forever be remembered".
In January, Sky Sports recruited the Blue Peter presenter to lead its coverage of the National Basketball Association (NBA) London Game 2019, following his BBC coverage of the 2018 Winter Olympics in Pyeongchang, South Korea.
He previously reported on CBBC's Match of the Day Kickabout and in 2017, was one of the co-presenters for ITV's game show Cannonball, alongside BBC Radio 1's Maya Jama.