The fashion chain is set to launch in the UK in November with stores in Dublin’s Jervis Centre and Birmingham Bullring.
A London store is expected to follow later this year. Forever 21 is also launching an online store.
Le Bon, who is Simon and Yasmine Le Bon’s daughter, is likely to star in advertising campaigns for the fashion brand.
She has previously modelled for brands including Moschino, swimwear brand Myla and UK high street fashion chain River Island.
The fashion chain will rival high street fashion chains New Look, Topshop and H&M in the UK with affordable women’s and men’s fashion ranges.
The chain operates 460 stores across the US and has been likened to Topshop.