John Stamos raised the stakes in his joke battle with Nick Jonas, while he published a photo of himself apparently getting a tattoo of the singer's face.
The Fuller House star and the singer received various objects – including a sweatshirt, a pillowcase and a blanket – with the faces of the others printed since February (19).
John, 55, shared a snapshot of himself on Instagram that was inked with the face of the youngest member of the Jonas Brothers and titled "#jobrosforlife".
Nick immediately identified the post and commented, "Ok … okay …"
Even his older siblings intervened, with Joe leaving a series of laughing emoji cries, while Kevin wrote "No way !!!!!"
The wife of the Scream Queens star, Caitlin, then commented boldly: "@nickjonas will have to name his first-born John Stamos".
John became public with his love for the Jonas Brothers and wore a T-shirt with the band at the American Music Awards in October (18).
Nick started the joke war in February when he was wearing a sweatshirt with a photo of the former teen heartbreaker wearing a Jonas Brothers t-shirt.
The 26-year-old then posted a photo of paparazzi on him wearing the hooded sweatshirt on Instagram and titled the post, "It's your move @johnstamos".
John then had a pillow made with a screenprint of Nick who wore the sweatshirt and shared the image on social media. "I had the craziest dream last night …" he wrote, next to a photo of himself pretending to sleep on the pillow.
At the beginning of this week (late 17th March 19), Nick revealed that he had a blanket made with a picture of Stamos's pillow. "I'll sleep well tonight knowing that #sucker is number 1!" He titled the post, celebrating the first single from the Jonas Brothers after meeting at the beginning of this month.