The Melbourne Forum Theater is a music, cinema and theater venue located on the corner of Flinders Street and Russell Street in Melbourne, Australia. Built in 1929, it was designed by the eminent American architect John Eberson.

Designed as an "Atmospheric Theatre", the interior is meant to evoke a walled Florentine garden, complete with a sky blue ceiling sprinkled with lights like twinkling stars, like the evening sky.

Address: 154 Flinders Street Melbourne, Australia

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The building features a Moorish design, with features of a tower and clock tower. When it opened in February 1929, it had the largest seating capacity in Australia, accommodating 3,371 people.

In 1963, noticing changing audience trends, the Greater Union cinema chain converted the now oversized auditorium into two smaller theaters, and renamed it Forum.

In 1981 further renovations took place, including the renaming of the cinema to Forum I and Forum II.

In 1995, the Forum theater was purchased by a Company called David Marriner's Staged Developments Australia, who redeveloped it for use as a film and concert venue.

The theater was registered on the Victorian Heritage List in 1978 and classified by the National Trust of Australia in 1994.