One source claims the 18-year-old was actually bullied for being there -- apparently not everyone thought she earned the right to walk the shows!
The insider spilled:
To hype up her new store Lucy In Disguise, Lily Allen and sister Sarah Owen have made a short film of models playing and parading around in vintage clothing.
The full film makes its debut on September 18th, but Silly has released a video of what all went down behind the scenes.
Check out all the vintage fabulousness in the clip, above!