Emmy Rossum's wedding dress has been designed by Carolina Herrera.

The 30-year-old actress is set to tie the knot with 'Mr. Robot' creator Sam Esmail after she accepted his marriage proposal in August 2015.

Rossum has been busy planning her nuptials and she has let slip that she has hired legendary Venezuelan fashion designer Herrera to create her bridal gown.

Speaking to E! on the red carpet at 'An Evening Honoring Carolina Herrera' in New York City on Tuesday evening (12.06.16), she said: ''Yeah, she'll be making it. That's all I'll say!''

The 'Beautiful Creatures' star has been wearing 77-year-old Herrera's creations for many years.

After wearing one of her dresses at the New York Botanical Garden's 2015 Conservatory Ball, Rossum took to her Instagram account to thank her ''fashion fairy godmother'' for dressing her so well.

She posted: ''She is like a fashion fairy godmother watching over to be sure the fit is perfect! She is kind, elegant, wickedly funny and I'm lucky to call Carolina my friend.''

Rossum was also invited to attend Herrera's New York Fashion Week show earlier this year.

Other than the dress designer, Rossum has been very coy about her wedding plans, even though she has her big day planned out.

The 'Mystic River' star - who began dating her fiancé in 2013 after he cast her in his film 'Comet' - previously said: ''I'm not even answering my family who asks me. I know everything. I'm just not sharing it!''

Rossum was previously wed to music executive Justin Siegel but she filed for divorce in September 2009 after just 19 months of marriage citing ''irreconcilable differences'' in her legal papers.