He was only spotted stepping out with her for the first time in public earlier this week.
But already it seems Blanda Eggenschwiler has made it into the Jonas Bothers’ wives and girlfriends group.
The model/graphic artist was spotted heading to dinner with the band on Saturday night, following their gig at Hollywood’s Pantages Theater.
The Swiss brunette was snapped with the 23-year-old singer – who she has apparently been spending a lot of time with in the past few weeks – as they arrived at Katsuya restaurant nearby.
Holding on to her new man’s hand, Blanda donned a black lacy mini dress which she teamed with a bowler hat.
Joe on the other hand stood out as he kept his stage outfit of a bright yellow blazer jacket over a white T-shirt on.
The pair were joined for the Japanese meal by his older brother Kevin Jonas and his wife Danielle Deleasa.
The stars of E!’s reality show Married To Jonas opted for blue and black colours in their attire.
Danielle’s shoes being heeled, her husband offered a helping hand as they tackled the steps outside of the venue.
The youngest member of the group, Nick, appeared to be unaccompanied by a female for the outing but that does not mean he isn’t having his fair share of fun with the ladies.
Perhaps he just hasn’t decided on who will be that special someone yet and has opted not to induct anyone into their WAG club yet.
Joe’s love interest Blanda is based in New York, where the Jonas Brothers recorded parts of their forthcoming as-yet-untitled album this summer.
A friend of the siblings seemed to confirm the fresh romance in a picture post on Twitter the prior evening.
Singer Jordan Baird, a finalist on the reality TV competition The Next which featured Joe as a judge and mentor, shared a snap of himself with Blanda and Kevin’s wife Danielle.
The caption alongside it read, ‘hanging with the brothers ladies before the show.’
However the post was later deleted, according to Starpulse.com and he wrote instead, ‘Great night last night with @joejonas@nickjonas @kevinjonas @daniellejonas & some other amazing people. Going at it again tonight!’
Joe – who has dated X Factor USA judge Demi Lovato - may well have had a run-in with ex beau Taylor Swift when they did their performance as part of the Kiis FM Jingle Ball in Los Angeles.
Her performance marked the first time the pair have performed at the same show since they split in 2008.
Joe previously dated Taylor Swift for three months in 2008, reportedly ending their relationship over the phone.
He then romanced Camilla Belle, who starred in the Jonas Brothers' music video Lovebug.
Later, he was linked to Twilight star Ashley Greene. The pair are believed to have split in March of last year.
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