Will Ferrell has starred in another strange Super Bowl commercial for Old Milwaukee beer.

The 'Anchorman' actor - who has appeared in more than a dozen adverts for Pabst Brewing Co., which makes the beer - is spotted passionately kissing an Asian woman at the back of a bus in the bizarre ad, which only aired across three states in the United States during Sunday's American football extravaganza.

The commercial - which was seen in Texas, Oklahoma and Montana - shows the star sporting a moustache and wearing a white-and-red vest during the make-out session. It has become a viral hit, much like his past adverts for the company.

His 2012 Super Bowl commercial for Old Milwaukee only aired in one US city, North Platte, Nebraska, but it's thought the marketing strategy behind the commercials is for them go viral through viewers sharing the clips on social media networking sites such as YouTube.

The actor reportedly offered to star in the adverts free of charge because he enjoys the creativity behind them.

Bryan Crowley, Pabst Brewing Co.'s chief marketing officer, previously said: ''Will approached Old Milwaukee because he's a big fan of the beer and thought it would be fun to make the commercials, and we couldn't be more excited that he did.''