Jennifer Garner in Oscar de la Renta

Simple elegance was the key for Jennifer Garner as she came out for the Coach Children's Defense Fund Benefit on April 20.

Jennifer opted for a sophisticated navy blue dress from Oscar de la Renta, and teamed it with black Casadei peep-toes and a Coach clutch.

For a similar navy sheath look, without the Oscar de la Renta price tag, check out Dorothy Perkins' £42 Front Pocket Dress, or ASOS's £40 Tailored Linen Dress, in Navy.

Pics from Zimbio

Jennifer Garner's Gorgeous Grey Look

Out for the Arthur premiere of April 5, Jennifer Garner looked elegant, co-ordinating with her co-stars in a grey top and pencil skirt ensemble from the Oscar de la Renta Pre-Fall 2011 collection.

Her glittery jewels were from Cartier and the black satin platform pumps were Casadei.

Jennifer's lace skirt is so beautiful and there are lots of affordable alternatives out there if you'd love the look for yourself.

BB Dakota's $70 Issac skirt is a cute mini version.  It's pricey at $295 but Josie Natori's Dragon Lace Skirt is an almost exact likeness of Jennifer's Oscar de la Renta.  And if that, it's back on budget with Forever 21's $15.80 Ruched Panel Skirt.

And, if you're in the UK, there's Boo Hoo's Rose Lace skirt, costing just £8.00.

Pics from Zimbio