Neither of the movie stars have commented on their brewing relationship, although the notoriously private couple did share a sweet, brief kiss for all the world to see after her she won Best Supporting Actress for her work on "The Danish Girl."
Svante Vikander used the word "boyfriend" when describing his daughter's big night.
Alicia's dad told the Swedish newspaper Expressen Noje that he expected his daughter to win, but he didn't have the same feeling about Michael.
"Alicia's boyfriend Michael did not expect to win," he said, "He joked beforehand that it was best for everyone."
Svante said Michael told him that "The media will kill me if I steal the gong from Leo."
Like any proud father, Svante was ecstatic when his daughter took home the prize.
"I told people 'I know her!'" he said. "She was so happy and walked around with her statuette under her arm all night, it was so heavy he had to change arms sometimes."
Her dad, who was at the Oscars with Alicia's mother, said he didn't accompany his daughter or her man to an afterparty.
"We went home at 12:30 and then they moved on to the Vanity fair party," he said.
Whether Alicia or Michael will actually confirm the romance themselves remains to be seen. She did not mention him in her speech, nor was he mentioned in the "Oscars scroll."
Earlier this month, despite enormous pressure, they wouldn't kiss during a segment in the BAFTAs when a kiss-cam showed celebrity couples.
Michael also did not walk the red carpet with Alicia at the Vanity Fair afterparty, although they did meet up inside.
Last month, Michael was asked about his girl by ET. In a very rare and very short response, he said he was "very proud" of what she had achieved.
Alicia and Michael began dating in 2014 after meeting on the set of "The Light Between Oceans."
The pair reportedly split in September 2015, but they are now clearly back on again.
Last year, Alicia spoke of why she keeps her dating life so private.
"I knew that celebrity was a side-product of my career choice, and it's totally worth it if I get to do what I love, but it's not something I feel very comfortable with," she told Net-A-Porter.
"I've spoken to a lot of actors who have taught me that it is a choice. I believe that staying private is something you can choose, and it is certainly the choice I'm making."