Sienna Miller and Sister Channel 1950s Mexico for Runway Collection

LONDON (CBS) Boyfriend Jude Law was in the front row this weekend when actress Sienna Miller and her designer-sister, Savannah, showed off their Twenty8Twelve 2011 Spring and Summer collection during London Fashion Week.

The collection for the three-year-old label was well received by critics.

It featured mostly casual clothes inspired by Mexico of the 1950s. These included many full skirts - with petticoats, no less - in hot Caribbean colors.

The sisters say they aim for clothes that will span several generations.

"The other day I was in the store and there were three generations of women in there - a grandmother, a mother and a daughter - and everyone was able to buy clothes that they really felt reflect who they were and how they wanted to portray their personalities," Savannah said in a newspaper interview . "So, it is nice that it can be worn in that way."