Nina Dobrev and Ian Somerhalder dating rumors came into halt when reports that "Twilight" star Nikki Reed began dating the "The Anomaly" star made headline last week. Reports also said that "The Vampire Diaries" actress is making her ex-boyfriend jealous as she kissed Derek Theler at Comic-Con on July 26.

"The Roommate" actress Nina Dobrev was seen sharing PDA with "Baby Daddy" hunk Derek Theler on Saturday while Ian Somerhalder was also seen kissing his rumored girlfriend Nikki Reed.

According to an insider from Hollywood Life, the smooch that Nina Dobrev and 27-year-old Derek Theler shared only happened because they were drunk.

The insider reportedly said to the news site, "The kiss from the Baby Daddy guy was in the moment out of nowhere liquor-enabled kiss."

"No tongue and no major passion," the insider added.

The source also noted that Nina Dobrev and Derek Theler were having fun but did not "really continue for the whole night."

Ian Somerhalder's ex-girlfriend also reportedly flirted with Miranda Kerr's ex Orlando Bloom and 35-year-old Ben McKenzie.

The source said, "Nina was having the time of her life and looked like she didn't have a care in the world."

Meanwhile, 35-year-old Ian Somerhalder was "sweetly and passionately" kissing "Twilight" actress Nikki Reed at the event. Reports last week revealed that the two are now an item as they were spotted on a series of dates.

Nina Dobrev and Ian Somerhalder dating again rumors started earlier in June when "The Roommate" actress' mother was reportedly making way for the two to get back together.

Allegedly, Nina Dobrev's mother did not want her daughter to sleep around with different guys and had made supportive efforts for Ian Somerhalder in Twitter, the Celebrity Laundry reported.

Other guys that the 25-year-old actress reportedly dated were Miley Cyrus' ex-fiance and Hunger Games actor Liam Hemsworth and Muse band member Dominic Howard.

Nina Dobrev and Ian Somerhalder dating began three years ago when they met at the set of "The Vampire Diaries" but the on-screen couple called it off last year.