William Herbert "Bert" Woodruff (April 29, 1856[1] – June 14, 1934[2]) was an American actor of the silent era.

In 1882, he became part of the Adelphi Theater stock company in Peoria, where he worked for seven years.

From there he went to Redondo Beach, California, where he opened the city's first theater for films.

He remains perhaps best-known for playing the grandfather in the 1928 Harold Lloyd comedy Speedy.

Woodruff died of nephritis in Hollywood, California, aged 78.