Pippa Middleton signs party-book deal

The sister of the Duchess of Cambridge, whose bridesmaid's dress turned heads, has struck a $622,000 deal to write “How to Be the Perfect Party Hostess.”

Pippa Middleton became a household name in April when she famously walked down the aisle of Westminster Abbey in a form-fitting dress as maid of honor in older sister Kate’s wedding to Prince William. (ABC News)

Kate Middleton, 29, right, and her sister Pippa, 27, have become household names after Kate's historic wedding to Prince William in April. Kate tapped younger sister, Pippa Middleton, 27, left, to serve as her maid of honor. Click here for five things to know about Pippa Middleton.

LONDON, ENGLAND - JUNE 29: Pippa Middleton and then-boyfriend Alex Loudon attend a match at Wimbledon. (Photo by Julian Finney/Getty Images)

Britain's Pippa Middleton (R) an an unidentified companion watch the men's singles tennis final between Jo-Wilfried Tsonga of France and Roger Federer of Switzerland at the ATP World Tour Finals at the O2 Arena in London November 27, 2011. REUTERS/Eddie Keogh (BRITAIN - Tags: SPORT TENNIS ENTERTAINMENT)

Pippa Middleton sister of Kate, Duchess of Cambridge, with unidentified friend, watches the mens tennis doubles final between Max Mirnyi of Belarus and Daniel Nestor of Canada against Mariusz Fyrstenberg of Poland and Marcin Matkowski of Poland at the ATP World Tour Finals, at the O2 arena in London, Sunday, Nov. 27, 2011. (AP Photo/SangTan)

Pippa Middleton, sister of Catherine, Duchess of Cambridge, arrives for a semifinal between Spanish player Rafael Nadal and British player Andy Murray at at the Wimbledon Tennis Championships at the All England Tennis Club, in southwest London on July 1, 2011. AFP PHOTO / GLYN KIRK RESTRICTED TO EDITORIAL USE (Photo credit should read GLYN KIRK/AFP/Getty Images)

Britain's Pippa Middleton watches the men's singles tennis final between Jo-Wilfried Tsonga of France and Roger Federer of Switzerland at the ATP World Tour Finals at the O2 Arena in London November 27, 2011. REUTERS/Toby Melville (BRITAIN - Tags: SPORT TENNIS ENTERTAINMENT)