Littner was born in 1949 in city of New York, USA. His father was Austrian-Jewish and his mother was American. He has both American and British nationality. His ethnicity is Jewish. His father used to work as a chemical engineer and run the family. The family then went to UK for a better future after the birth of Littner. Littner started his career as an accountant and then became a specialist later. Then, he met Lord Sugar and chaired a number of companies with his boss. During the 1990s, Littner was chief executive as well as chairman of Amstrad International, Dancall Telecom and Amstrad Spain.
In his early days, Littner was the non-executive chairman of a company called Azzurri Communications. He was also the deputy chairman of his famous group, Blacks Leisure Group for a year. Likewise, he was the executive chairman of the oilfield business company ASCO for three years until 2007. Later, he also was the non-executive director of Myeloma UK and Norton Way Motors Ltd. In 2009, Sugar resigned from a lot of directorships of his companies and handled the respective duties to Littner. Sugar was the owner as well as the chairman of Tottenham Hotspur football club and Littner was the chief executive for 5 years. Later, he resigned from the directorship of his company in 2001 and bought Powerleague which was more of a centre operator for five-a-side football. In 2003, he was the leader of management buyout of his 3i Group. In 2009, the company was in charge of the Patron Capital.
He gained wide fame and popularity due to his direct style of confronting people in job interviewing on the popular show, The Apprentice.
interviewing on the popular show, The Apprentice. He is the only interviewer who has appeared in this role in all the series of the show. Then in 2015, an announcement was made that Littner was replacing Nick Hewer as the aide of Lord Sugar on the apprentice. In October 2014, in appreciation of his contributions to the University of West London's Business School, it was renamed as the Claude Littner Business School, one of his business schools london. It was opened by his colleague, Lord Alan Sugar.
Littner was diagnosed with blood cancer more widely known as Non-Hodgkin Lymphoma in 1997 at the height of his career. Fortunately, he was able to survive the dreadful life taking disease. Regarding his marital life, he was dating his girlfriend Thelma Littner for a long time and they got married about 40 years ago. The husband and wife now live peacefully in their abide in north-west London. They have two children named Anthony and Alex. Besides this, Littner have not engaged in any affairs or divorce since then.
Littner has 33.9 thousand followers and around 6000 tweets in Twitter. He has a lot of posts and photos in his profile. However, he does not seem to be active in Instagram. It may be because he does not have much time for this as he is a very busy person himself. He is said to have an estimated net worth of 34 million pound sterling sufficient for any individual to live a comfortable and a luxurious life anyone can dream of. For more information about his personal life or bio, you can visit several wiki sites in the internet or other sites like IMDb.