Tiruvellore Thattai Krishnamachari (1899–1974) was the Indian Finance Minister from 1956–1958 and from 1964-1966. Krishnamachariar graduated from Madras Christian College (MCC) and was a visiting professor to the department of economics at MCC. He resigned from the position twice. He was popularly known as TTK. He was also a member of drafting committee, an entrepreneur and congress leader.
He resigned from the post of Minister in 1965 after his term as Lok Sabha member was over and led an intellectually active life till illness overtook him.