The two were recently seen enjoying a trip to Sherman Oaks here. According to a source, the “That '70s Show” co-stars stayed in the treat shop for about 15 minutes.
They were seen holding hands and cuddling together while eating their dessert, before clicking a photo with a fan. Her ring finger had the jewellery, hinting at their engagement.
"She was wearing a small ring on her left hand. It was petite, but still noticeable and pretty," eonline.com quoted a source as saynig.
They have been dating over a year.
Pics: Prabhas, Tamannaah Bhatia at 'Baahubali 2' first look launch at MAMI
'Ae Dil Hai Mushkil' photos: Aishwarya, Anushka, Karan get candid at MAMI
Photos: Huma Qureshi, Neha Dhupia and other celebs at MAMI
Photos: Amy Jackson, Daisy Shah at Mumbai airport
Photos: Sridevi, Irrfan and other celebs at 'Mughal-e-Azam' screening