Morgan Freeman starred in a Listerine ad from 1973, reports News.com.au. Before 'Armageddon" and 'Sixth Sense", Bruce Willis was doing ads for the makers of Seagrams, with a number of these musical gems made in the 80s. Before Tori Amos sang about a Cornflake Girl and became the queen of indie piano rock, she was the cornflake girl in a 1985 commercial for Kellogg''s Just Right cereal.
Russell Crowe is known off screen as something of a bad boy type, and in one of his first starring roles was cast as a delinquent school leaver being urged to consider the priesthood in this commercial for the Seventh Day Adventist Church. In 1986, Jason Alexander (George from Seinfeld) starred in a musical ad for McDonald''s McDLT sandwich.
Courtney Cox has recently starred in sitcom 'Cougar Town", but way back when in the mid-80s, when 'Friends" was yet to happen, she was the pin up girl for Tampax tampons.