The agency will be the first content shop that Swarovski has worked with.
The brand is looking to engage with audiences through video in the UK and Somethin’ Else has been tasked with building "strong and long-lasting" relationships with existing and new customers.
Somethin’ Else is planning to produce content featuring Kate Thornton, Denise Van Outen, All Saints’ Mel Blatt and Tamsin Outhwaite. The agency will also work with Thornton’s website TB Seen, a cashback site with celebrity content contributors.
The new content will run during the autumn/winter 2016 campaigns across social and digital platforms.
Hayley Quinn, UK and Ireland managing director at Swarovski, said: "Somethin’ Else really impressed us with their strategic thinking and creativity.
"They quickly got to the heart of our brand and showed great insight into our audience, coming up with creative ideas that will ensure the content we put out is entertaining and adds to the experience our consumers have with our brand."