Who was the friend and biographer of Samuel Johnson?

The friend and biographer of Samuel Johnson was James Boswell. Boswell is best known for his work "The Life of Samuel Johnson," published in 1791, which provides a detailed and intimate portrait of Johnson's life and personality. Their friendship was characterized by Boswell's admiration for Johnson, and he meticulously documented their conversations and experiences together. This biography is considered one of the greatest in the English language.