01/14/2013 at 11:00 PM EST
doesn't know much about her eventual wedding day, but she's sure of one thing in particular: it's going to be over-the-top.
"If I'm going to do something, it's going to have to be a big event," the Modern Family
star, who is engaged to Nick Loeb
, told PEOPLE last Friday. "I just had my 40th birthday in Mexico
. I had more than 100 people."
Unfortunately for the starlet, along with an extravagant affair comes appropriate planning, which she's too busy for these days.
"Now I don't have the time – and it will have to be one weekend when I have the time to plan something fun," she says. "I don't even know what I'm going to do."
One item she can cross of her list of things to worry about on her big day is designating someone to give a toast at the reception.
"We don't do that type of tradition," she explains. "[Nick and I want] more like of a party [with] music, dancing, a lot of food; not really sitting there hours and giving speeches."
Ironically, Vergara is the one doing some cheers of her own when she gives an impromptu wedding speech in the latest Diet Pepsi commercial
, as part of her "Love Every Sip" campaign.