Amy Marguerite Brandon Thomas (9 March 1890 – 6 May 1974) was an English film and stage actress.

She was next seen at the Garrick Theatre in 1908, as Lucy Lorirner in A Pair of Spectacles, with Sir John Hare, subsequently touring with him.

In 1910, she first played Portia in The Merchant of Venice at the Court Theatre, then appearing at His Majesty's Theatre with Sir Herbert Beerbohm Tree as Olivia in Twelfth Night, then touring as Portia with Arthur Phillips's company.

The next year, at the Theatre Royal, Drury Lane, she reprised the role of Vivien in The Passing of the Third Floor Back.

In 1917, at the Haymarket, she played Evelyn Garland in Felix Gets a Month, ending the year at the St. James's in Charley's Aunt, again as Kitty.

[3] Beginning during World War I, and until the 1930s, she made several films, most notably as the defending counsel in Alfred Hitchcock's Murder!

[2] In later life, Thomas and her husband lived in Surrey, where the architect Oliver Hill designed two houses for them: Woodhouse Copse in Holmbury St Mary, built in 1926, and Burrows Wood in Gomshall in 1939.