Nicky Hilton is ofter first with directional trend pieces and this week she was spotted at the 'Bra Boys' premiere working the coat dress. Nicky opted for a houndstooth coat dress which she teamed with PVC leggings (Fergie, take note!) and funky heels.
Admittedly, a coat dress is harder to pull off than say a jumper dress as it is much more structured and needs to be worn with the right items. For example, when wearing the coat dress you do not want to end up looking like you forgot to take off your coat because it is too cold etc. This rule also means that you cannot wear a coat you already have with nothing but a pair of tights!
Coat dresses are usually very structured, maybe with emphasis around the waist (as seen on Nicky). You also need to keep all other aspects of the outfit quite simple so opt for plain accessories and leggings or tights. See some examples below.