Marcus McDermott (also credited as Marc MacDermott; 24 July 1871 – 5 January 1929) was an Australian actor who starred on Broadway and in over 180 American films from 1909 until his death.

[1][2] McDermott was born in Goulburn, New South Wales to Irish parents and he attended Saint Ignatius' College, Riverview in Sydney.

In mid-1902 McDermott traveled to New York via Canada, joining Mrs Patrick Campbell’s a company soon after and appearing on Broadway, as Sir George Orreyed in The Second Mrs. Tanqeray.

The next year, McDermott was cast as Ebenezer Scrooge in the short seventeen-minute silent film adaptation of Charles Dickens' work, A Christmas Carol.

The Edison Studios production consisted of twelve one-reel episodes released monthly starting on 26 July 1912 to coincide with the serial of the same name published in McClure's Ladies' World magazine.