Calvin Klein Collection has another collaboration in the pipeline.

Womenswear creative director Francisco Costa has revealed he is currently planning a second partnership following his successful limited edition capsule collection with US department store Macy's, which marked the label's first joint line.

He hinted to website Fashionista: ''I just did this line for Macy's. I'm in the process of doing another line for somebody else, with another company, through Calvin.''

The designer was lucky enough to dress actress and fashion icon Katie Holmes for the Met Ball earlier this month, but was surprised when the star opted for another one of his gowns at the last minute.

However, Costa believes the second choice, a flowing white dress, was much more suited to the brunette beauty.

He added: ''[Katie Holmes] had fitted the dress, loved the dress and I said, at the last minute, that I had another dress I'd like to try. She says, 'Oh my God, I like this dress better,' and she really brightened up.

''So I said, 'That's the one we have to go with'. The original dress was beautiful, very much like the spring collection that's in the [Costume Institute] exhibition - it's a beautiful bustier, deep green with a peplum and separate skirt.''

Ignoring the gala's 'Punk: Chaos to Couture' theme, Costa's aim was to make Katie look ''beautiful'' - despite not fitting in with the ambiance.

He mused: ''Who wants to look at a theme. It's not about a theme when you're getting dressed - it's about looking beautiful. It's about looking gorgeous.''