Click on photos for more pictures of Jamie and Evan.
The loved-up couple, who welcomed their first child, a baby boy, in July, arrived arm in arm at the LACMA 2013 Art + Film Gala in Los Angeles.
Evan looked stunning in a floor length black Gucci gown that showed off her slender figure. The True Blood star completed her outfit with a black leather clutch and matching black nails.
Jamie, meanwhile, looked dapper in a black suit and tenderly embraced his wife as they posed for the cameras.
Other famous couples to attend the high-profile event, held in honour of Martin Scorsese and David Hockney, included Jason Sudeikis and Olivia Wilde and Robert Downey Jr. and Susan Downe.
Earlier this week Jamie and Evan showed the world just how much in love they are, as they exchanged gushing messages on Twitter to celebrate their one-year anniversary.
"It's been 12 months since I told someone how much I loved them. I'm forever thankful they chose me. Happy Anniversary @evanrachelwood XXX," wrote Jamie.
"Happy anniversary @1jamiebell! You are the best husband and father anyone could ask for. Here is to many more adventures ahead. I love you x," replied Evan.
Evan and Jamie started dating in 2005 after co-starring in the music video for Green Day's song Wake Me Up When September Ends.
The couple broke up in 2006 — Evan went on to have a highly publicised relationship with Marilyn Manson — but rekindled their romance in the summer of 2011.
They were married in October 2012 in a small ceremony watched by family and close friends, and announced they were expecting their first child together in January 2013.