Selena Gomez taught Steve Martin the lyrics to 'WAP' while they were filming their new show, 'Only Murders in the Building'

• Selena Gomez taught Steve Martin the lyrics to "WAP" by Cardi B and Megan Thee Stallion.
• Gomez and Martin costar on the new Hulu comedy "Only Murders in the Building."
• The "Rare" singer also educated Martin on millennial slang, including terms like "OG."

Selena Gomez revealed in a new interview with Carina Chocano for Elle that she taught Steve Martin the lyrics to "WAP" while the two were filming their new Hulu show.

Gomez and Martin star on the new comedy "Only Murders in the Building" along with Martin Short. The show follows three residents of a New York City apartment building who become obsessed with solving the murder of a fellow resident, and make a hit podcast to document their findings.

The "Rare" singer said that during filming, she took time to explain pop-culture references - including the lyrics to Cardi B and Megan Thee Stallion's hit song - to the 76-year-old Martin.

"There was a line in the script that said, 'She's an OG.' And Steve walked up and said, 'Can somebody tell me what OG means?'" Gomez recalled. "I started dying laughing."

She had nothing but praise for her older costars. "I got to be in a space with so much wisdom," she told Elle. "They became my uncles."

Martin and Short also spoke highly of the former "Wizards of Waverly Place" star - Short called her a "brilliant actress," and Martin told Elle that he and Short "were both knocked out by her understanding that quiet acting is powerful acting."

"Only Murders in the Building" is Gomez's first major TV role since her stint on Disney's "Wizards." The first three episodes premiere Tuesday, August 31 on Hulu.

You can watch the trailer below.