The couple were pictured leaving an LA fitness centre on Tuesday (30 December) following a festive break together in Idaho. Twilight actress Nikki and Vampire Diaries star Ian are just back in LA after celebrating the holidays in snowy Sun Valley.
It marked their first Christmas together as they began dating in summer of this year.
Ian shared a heartfelt message to Instagram on Christmas Day, describing Nikki as "incredible" and "my love".
He said: "The Happiest of holidays to everyone, may nothing but smiles, family time and reflection come from these moments. I'm grateful for all of the love this years for me, us and ISF from everyone-may you empower all around you with the same strength and energy you have to spread positivity and compassion.
"Smiles are contagious-please spread them;) I'm grateful for and l love you all..."
Nikki and Ian began dating after she split from AmericanIdol star husband Paul McDonald. That separation was announced in March this year but it then emerged they'd been living apart for six months prior to making it public.
Earlier this year, defensive Ian leapt to Nikki's aid after she was targeted by online trolls.
After reading nasty comments about his other half, Ian said: "You HATE NIKKI REED? Really? Do you know her? Hmmmm, I'm not sure that you do. Look on her Instagram feed or Twitter and all you will see is a compassionate and beautiful human being.
"Please put your negative energy elsewhere. You don't even know the person you're talking about."
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