First, they split up last year.
But just last week, the two touched down in Canada together as Kellan prepped to film Breaking Dawn.
And this Saturday, AnnaLynne took a trip with his (soon-to-be) sister-in-law...
The 90210 starlet threw Kellan's brother's fiancée a bachelorette party in Vegas.
AnnaLynne even got on the mic at Wet Republic to introduce the bride-to-be as "the future Mrs. Lutz."
Hmm, does the actress hope that one day she might be a Mrs. Lutz, too?
"I'm very, very excited about her big day next week," AnnaLynne told partygoers at the poolside bash.
Kellan wasn't on hand for the festivities himself, but he also threw his bro a similar bachelor party in Sin City at Pure nightclub a few months ago.
We're guessing he probably had filming commitments this weekend for Breaking Dawn, but it probably would be a bit weird for him to attend a girls' bachelorette party weekend anyway, right?
Either way, with AnnaLynne is still involved in his family, it's pretty obvious AnnaLynne and him are so not over!