Elle Macpherson privately messaged Aerin Lauder on social media to ask to collaborate.

The 52-year-old Australian model has admitted she direct messaged the 46-year-old businesswoman via Instagram because she was ''obsessed'' with Aerin's photo-sharing account and was desperate to partner with the home décor mogul on their latest product Aerin x The Super Elixir, which is filled with the vital nutrients.

Speaking to Elle.com about the partnership, the golden-haired beauty said: ''I didn't know Aerin at all. Like, at all. But I was obsessed with her Instagram. One weekend, I saw that we were both in the same city. I wanted to text her, but how would I get her number? So instead, I DM'ed.

''Then this summer, I was in the Hamptons doing a personal appearance for WelleCo. I was on Instagram, and I saw Aerin's photos. I was like, ''She's in Montauk! I'm in Montauk! I need to message her.''

And Aerin has revealed the pair had crossed paths briefly in the past, and was surprised Elle reached out to her officially this year.

She said: ''When I was a teenager, I was at Prada in Paris, and Elle came in. I remember she was wearing these amazing gray pants, she was so beautiful, and she was trying on shoes ... but we'd never really met until this summer, when I got an Instagram direct message from her. I turned to my husband and said, ''You are never going to believe who this is.''

And the 'Britain & Ireland's Next Top Model' host - who presented the competition from 2010 to 2013 - has revealed she has ''admired'' Aerin for ''a really long time'' and has ''always'' wanted to join forces with her.

She explained: ''I've admired Aerin for a really long time. Watching her build her business, I've always wanted to do something with her.''