Ian Somerhalder and Nikki Reed have officially tied the knot!

Los Angeles - Ian Somerhalder and Nikki Reed have got married.

The Vampire Diaries actor and his Twilight actress fiancee are reported to have tied the knot on Sunday after photographs of their wedding ceremony emerged on Twitter.

Nikki, 26 - who was previously married to singer-songwriter Paul McDonald - can be seen in a stunning long-sleeved lace gown while Ian, 36, donned a white suit and shirt.

The former Lost actor - who previously dated his co-star Nina Dobrev - appeared to confirm the news by taking to his Twitter account to gush about the big day, which is thought to have taken place in his hometown in Louisiana.

Louisiana here we come!We've missed you... Home sweet home

— ian somerhalder (@iansomerhalder) April 24, 2015

most beautiful morning ever...

— ian somerhalder (@iansomerhalder) April 26, 2015

Ian also revealed that he and Nikki - who got engaged in January after six months of dating - had been working out in preparation for the special occasion after posting a picture of them both lifting weights on Instagram.

Getting ready for the day...Setting intentions. Wow. Life.

A photo posted by iansomerhalder (@iansomerhalder) on Apr 24, 2015 at 7:52am PDT

Meanwhile, Ian's Vampire Diaries co-star Kat Graham recently confessed that she believes the couple are true "soul mates".

She said previously: "I haven't met two people that were more of soul mates than those guys. They are so absolutely amazing. Everyone loves them, and I really can't imagine him with anyone else."