Christian Siriano Has No Wedding Plans Yet – But He's Not Worried
08/22/2013 AT 12:15 PM EDT
"We have, like, no plans yet," the Project Runway winner told PEOPLE at Moët Chandon's 270th Anniversary party in New York on Tuesday. "I haven't had time with planning [my upcoming] collection – I know, it's really sad."
The designer and his fiancé, recording artist Brad Walsh, exchanged Saint Laurent engagement bracelets in July – and Tweeted photos of their newly accessorized wrists – but have decided very little about their upcoming nuptials.
But Siriano has come to one realization already: size matters.
"We want it to be small and intimate, but I don't think it will be," he says. "It's always about the guest list growing and growing – that's the exciting part!"
So who's in and who's out? No word yet on whether or not his good pal and client, Project Runway host Heidi Klum, will be in attendance, but she did send her congratulations on Twitter.
And though he's focused on designing rather than planning a wedding, Siriano is sure he and Walsh will make it work – eventually.
"Listen," he says, "we know everyone in the world. It will not be hard."