Sir Terry passed away on 30 January, having kept broadcasting nearly until his death.
There will also be a special children's edition of popular panel show Would I Lie To You?, hosted by Rob Brydon and with team captains David Mitchell and Lee Mack.
He closed his last broadcast with the words: "Thank you for being my friend".
However, what really matters is your donations.
While a fifth added: "Watching Children In Need.In tears already with the mention of the Late Sir Terry Wogan!" Will they beat that?
Children will take part in a Tapathon from 12-4pm, as part of a Nationwide Tap Dancing Attempt for BBC Children in Need.
Rochelle will be joined by husband Marvin and fellow presenters Graham Norton, Tess Daly, Greg James and Ade Adepitan.
The evening is hoping to raise millions of pounds for children and young people around the world.
The Strictly Come Dancing Children In Need special saw taekwondo athlete Lutalo Muhammad crowned the victor of the Pudsey trophy.
The four Olympians danced a routine to Lady Gaga's Edge Of Glory in front of Strictly judges Len Goodman, Craig Revel Horwood, Darcey Bussell and Bruno Tonioli in the special, hosted by Daly and Claudia Winkleman.
"I was overwhelmed by the response to it and now it has a new home I do sort of miss it, in a way".
He was last on air on Radio 2 on Sunday November 8th 2015, presenting "Weekend Wogan".
Lady Wogan said the family have been overwhelmed by the tributes paid to the star since his death.
Nine-year-old fundraiser Lauchlan Muir was then welcomed to the stage to become the first recipient of the award for his dedication to charitable work.
Muir said he only found out he was the victor that morning when his brothers woke him with confetti cannons.
With Hampshire families huddled round their radios awaiting the annual festive address from King George V, the BBC launched its first plea to help needy British children facing a range of disadvantages, from poverty and deprivation to abuse and neglect.