TV/film extra

Production companies need people of all shapes and sizes and if you're over 18 but look younger you'll be especially popular, as you can save them the cost of a chaperone for a child actor. Don't expect to meet the stars, though.

Average pay: £80 a day, with bonuses for things like providing your own costume or doing a 'walk-on'. Overtime is paid at around £11 an hour.
More info: there's a list of extras agencies at UK Screen