Tan Sri Tunku Abdullah ibni Almarhum Tuanku Abdul Rahman (2 May 1925 – 20 August 2008) was a notable Malaysian businessman and a founder of the Melewar Group Berhad of companies.

Tunku Abdullah was born on 2 May 1925 at Kuala Pilah, Negeri Sembilan. His father was Tuanku Abdul Rahman (1895–1960), the Ruler of Negeri Sembilan state (1933–1960) and later appointed at the first King of Malaya (1957–1960). His mother was Che Engku Maimuna née Dulcibella (Dulcie) Campbell, a nurse at the Government Hospital in Kuala Lumpur. Tunku Abdullah was appointed to the state royal-rank of Tunku Panglima Besar in 1963. He was fondly known as "Charlie", as he was a fan of pianist Charlie Kunz.

During the World War II Japanese occupation of Malaya, each of the Malay royal families were required to send an heir to Japan for training to become part of the empire. Tunku Abdullah was 18 years of age when he arrived in Japan in a group with the other Malay royal heirs. When he was 20 years old, he witnessed the flash of light in the sky from the Hiroshima atomic bomb. With the surrender of Japan in September 1945, Tunku Abdullah became Public Relations Officer for U.S. Sixth Army HQ in Kyoto. On 15 December 1945, he returned by ship to Singapore.

He had completed his graduation from the University of Glasgow and held a diploma in agriculture from Miyazaki University in Japan. Tunku was in the civil service and served for 10 years before getting into politics.

Tunku Abdullah joined the civil service in many capacities: As Malay Officer to Kuala Lumpur Land & District Office (1955); as Assistant District Officer II in Kuala Selangor (1956); as Deputy Superintendent of Census (1956) for the Federal Secretariat; as Assistant State Secretary (1958) in Kuantan, later as District Officer (1960); as District Officer to Ulu Selangor (1961); as Assistant Secretary (1962) to Ministry of Works, Post and Telecommunications; leaving in 1963.

Encouraged by Mubin Sheppard, Tunku Abdullah also joined the Malayan Association of Youth Clubs (MAYC) in 1954 as Honorary Secretary and later became President [1956-1971]; culminating in the completion of Wisma Belia building (on Jalan Syed Putra). He was also President of the Malaysian Youth Council (MYC) [1966-1972] & President of the Asian Youth Council (AYC) [1972-1976]. Under the World Assembly of Youth (WAY), he was a frequent delegate [1964-1972]. For the youth movement, he led many international delegations, missions & seminars: To Japan (1959, 66 & 77); New Delhi (1961); Cairo (1962); Amherst, USA (1964); New Zealand (1965); Netherlands (1967); Vienna (1968); Liege, Belgium (1969); Brussels (1970 & 71); Manchester (1972); and Colombo (1976). In April 1958, Tunku Abdullah arrived in Hawaii as a guest of the State Department of the United States. During this visit, he became good friends with Fuad Donald Stephens of {then} North Borneo {now, Sabah}.

Tunku Abdullah was elected as the Member of the Parliament of Malaysia (MP) for the Rawang constituency from 1964 to 1974. During this time, he began his long friendship with the MP seated beside him, Dr Mahathir Mohamad. He is the subject of the books Tunku Abdullah – A Passion for Life and the 20th anniversary version, A Prince Called "Charlie".

Tunku Abdullah consolidated his business ventures into a conglomerate under the name of "Melewar" Group or Corporation.