Missoni for Target is so last season. The latest must-have designer collaboration is Marni for H&M, which celebrated its launch with a star-studded party in Los Angeles on Friday.

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Glee's Dianna Agron went for a feminine all-pink Marni ensemble, with a puffy silk blouse and pleated skirt.

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Drew Barrymore turned up in a colorful polka-dot dress, plus a Lucite necklace and knee-high socks, all from the upcoming collection, which hits stores March 8th.

"I love that it's accessible and affordable," she gushed to Us Weekly about the line. "I love when people bring these high end designers to these stores where you can ‘supermarket sweep’ it and be crazy and not break your bank. That's what shopping's all about for me."

British actress Felicity Jones paired a green striped cardigan from the collection with a purple-and-gold full skirt, while The Help's Jessica Chastain opted for a a sleeveless tribal-print dress, also from the Marni for H&M line.

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