In photos obtained by E! News, the duo stopped by Delilah in West Hollywood after Ariel attended Luke's reading 'Really Really' at the Lee Strasberg Theatre & Film Institute.
"It was very clear they are a couple and they were affectionate all night long. They had their arms wrapped around each other and he put his hand on her waist," an eyewitness shared.
"They took pictures together with his phone and posed with their faces together."
The source added, "They came out [of Delilah] around 1:45 a.m. and stood rubbing each other's backs as they waited for their car. They never took their hands off of each other."
Ariel was previously linked to Levi Meaden, however she reportedly called it quits several months ago.