The Shoreham-born singer was originally scheduled to headline the four-day event in 2020, but it was cancelled due to the Covid pandemic.
Living in Australia has made it difficult for organisers to fit Wickham into Sayer’s schedule.
However, he is now confirmed to perform at the festival on Saturday, August 2.
He will share the stage with fellow Seventies icon, Tom Robinson.
The festival line-up also includes Fisherman’s Friends and Talisk on Friday, August 1, with Oysterband, Peatbog Faeries, Kate Rusby and Reg Meuross performing on Sunday.
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Leo Sayer finally set to perform at Wickham Festival, five years after initial plans (Image: Supplied) Peter Chegwyn, the festival organiser, said: “It has taken a few years to get him but we are delighted Leo Sayer will be playing Wickham at last.”
He added: “We were desperately disappointed when the 2020 festival was cancelled along with just about every other music event in the country.
“And I know Leo Sayer was very upset too.
“We had several conversations where we did everything we could to try and make it work but in the end it just wasn’t possible.”
Leo Sayer expressed his excitement about finally being able to perform.
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Shoreham-born Sayer’s 2020 headline slot was cancelled due to the pandemic (Image: Supplied) He said: “I was genuinely very disappointed not to be able to play Wickham in 2020.
“It was a horrible time for so many people and we kept hoping the event would be able to go ahead and give everyone a much-needed lift.
“As it turned out all major events were cancelled which was so sad as this would have been a special one for me.
“So, I am thrilled to be able to sign up for this year’s event.
“We will make it a great night to make up for what we missed out on before.”
The pandemic severely affected the music festival industry, with many long-standing events forced to scale back or shut down.
However, Chegwyn is grateful for Wickham’s loyal fan base.
He said: “Like everyone else, we were hit hard by the forced cancellation and it has been a struggle to keep going.
“But, as Leo Sayer says, The Show Must Go On.
“And it will.”
Four-day tickets are currently on sale at £220, with under 16s admitted at half price and under 10s paying just £10.
Day tickets start at £60, with a weekend camping pass starting at £40.