The couple are yet to confirm the good news.
The Game of Thrones alum, 23, wed the Jonas Brothers member, 30, in May 2019 in Las Vegas.
She and Jonas exchanged Ring Pops in lieu of wedding bands at the time.
“They’re enjoying the newness of being married and being able to call each other ‘husband’ and ‘wife,’” a source told Us exclusively at the time.
“They’re just super happy.”