David Doyle

David Doyle (born December 1, 1929, died February 26, 1997) was the voice of Grandpa Lou until his death in 1997 when Joe Alaskey took over. Outside of Rugrats, he was probably best-known for playing Bosley on the original Charlie's Angels TV series.

The episode "Lady Luck" was dedicated to him, and his final performance as Lou Pickles was in the episode, "Autumn Leaves."