Mila Kunis and Ashton Kutcher visited The Wild Life Sydney Zoo in Australia on October 31.
"Guess who just visited us," Wild Life Sydney asked on their official Facebook page. "Ashton Kutcher and Mila Kunis just popped on by and got up close with a Python Encounter and a koala photo too! Star struck."
A zoo spokesperson told People magazine that the rumored couple and "That 70's Show" co-stars "were very friendly" and "particularly enjoyed meeting our cuddly koalas, a python, a sugar glider as well as some wallabies with joeys in their pouches."
Later that evening, Kunis and Kutcher dined at the restaurant Three Blue Ducks with Australian model and MTV VJ Ruby Rose, Spice Girls singer Mel B and her husband Stephan Belafonte. Rose shared a photo (see below) of her dining partners on Twitter with the caption, "dinner last night.. Everyone's hall pass... And Ashton. Lol."
It is unclear whether the pair visited Australia for work or for pleasure, but Kunis is in the midst of filming "The Third Person" with Liam Neeson, Olivia Wilde, James Franco and Adrien Brody. The film is slated for release in 2013 and has been filming in Italy.
The two, who have been rumored to be dating since April, were recently photographed kissing in Central Park in New York City. The stars have not confirmed the romantic nature of their relationship and Kunis said in an interview with ELLE UK for the magazine's August issue, "Listen, we hang out. We've known each other for 15 years. We have mutual friends. We're comfortable with each other."
In mid-August, 29-year-old Kunis visited 34-year-old Kutcher on the set of his CBS sitcom "Two and a Half Men."
Kunis' spokesperson denied the two actors were dating back in April saying they "have been friends for years and met up for dinner with a group of friends."
The pair portrayed a couple on "That '70s Show," which ran from 1998 to 2006 and helped launch their careers. The two actors recently appeared together alongside their former co-stars Wilmer Valderrama and Laura Prepon on the "25th Anniversary Special" on the Fox network.
Kurtwood Smith, who played Red Forman on "That 70's Show," told E! News that he is very happy for the couple and remembered that their on-screen relationship was "awkward for Ashton" at first.
"You have to remember Mila was a kid. That was awkward for Ashton at the beginning. He was like 19 and she was like 14 or 15." Smith told E! News on November 1. Of their new romance, he said, "It's amazing. They're both great people, so I'm happy for them."
Kutcher and wife Demi Moore split in November 2011, after 6 years of marriage. Kunis split from her long-time boyfriend Macaulay Culkin, star of "Home Alone" in January 2011, after dating for eight years.