Graham Thalben Ball; professionally known as Johnny Ball (born 23 May 1938), is an English television personality, children's television presenter, writer and a populariser of mathematics. Ball regularly appeared on British television, predominantly on the BBC from 1967, featuring in or presenting programmes such as Play School, Think of a Number, Think Again, Think It ... Do It, Think...This Way and Johnny Ball Reveals All. He continued to appear regularly on British television, making guest appearances, presenting programmes or featuring in television and radio advertisements over several decades. He has also published a number of non-fiction books.
