Department for Culture, Media & Sport of UK (DCMS) shared the news on Twitter.
"We are delighted that @SrBachchan will read at the unveiling of the #GandhiStatue on Saturday," DCMS tweeted.
Bachchan, 72, retweeted the post.
Finance Minister Arun Jaitley will unveil the bronze statue, which will be the focal point for the commemoration this summer of the 100th anniversary of Mahatma Gandhi's return to India from South Africa to start the struggle for self rule.