Photos from last night’s 40 Under 40 dinner and awards presentation, featuring a CEO panel and keynote address by Mashable founder and CEO Pete Cashmore. Congrats to all the honorees!

Mashable founder and CEO Pete Cashmore (left) with PRWeek editor-in-chief Steve Barrett (right). Cashmore gave the keynote address at our 40 Under 40 Dinner.

Mashable founder and CEO Pete Cashmore (left) with PRWeek editor-in-chief Steve Barrett (right). Cashmore gave the keynote address at our 40 Under 40 Dinner.

Celebrate 40 of PR’s rising stars at PRWeek’s 40 Under 40 Dinner and Awards Presentation taking place at the 2012 PRWeek Conference and featuring speaker Pete Cashmore (above), founder and CEO of Mashable. Tickets are running out fast, so get yours today!

Celebrate 40 of PR’s rising stars at PRWeek’s 40 Under 40 Dinner and Awards Presentation taking place at the 2012 PRWeek Conference and featuring speaker Pete Cashmore (above), founder and CEO of Mashable. Tickets are running out fast, so get yours today!

Some say life begins at 40, but the PR professionals in PRWeek’s 40 Under 40 list are rising stars who have blazed trails and made long-lasting impressions in the industry—all before hitting the big 4-0.

Check out the rest of the list here.

First row (from left): Mashable’s Stacy Green, Jorge Plasencia of Republica, Weber Shandwick’s Allyson Hugley; second row (from left): Fleishman-Hillard’s J.J. Carter, NASCAR’s Jon Schwartz, and Hill+Knowlton Strategies’ Melody Lee.

Jennifer Temple, EVP and GM of Hill+Knowlton Strategies’ San Francisco office, will join Wells Fargo as SVP and head of consumer lending communications. Temple was one of our 40 Under 40 honorees in 2010.  We’re accepting nominations for this year’s 40 Under 40. Download a nomination form here.

Jennifer Temple, EVP and GM of Hill+Knowlton Strategies’ San Francisco office, will join Wells Fargo as SVP and head of consumer lending communications. Temple was one of our 40 Under 40 honorees in 2010.

We’re accepting nominations for this year’s 40 Under 40. Download a nomination form here.

PRWeek is now accepting nominations for this year’s 40 Under 40. Download a nomination form or email 40Under40@prweek.com for more info.