Tom Welling and Erica Durance Tom Welling and Erica Durance

Now that Smallville's Lois (Erica Durance) and Clark (Tom Welling) are engaged, it's only a matter of time before wedding bells will be ringing, right?

While the producers remain cagey on whether we'll see an actual wedding before the series ends, an upcoming episode will feature a pivotal moment for one of the most iconic couples in history. 

"There will be a big day for them," executive producer Kelly Souders tells

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"They're going to have a big moment in their relationship," executive producer Brian Peterson adds. "This last run is about not only his identity as Clark Kent and his growing identity as a hero, but also his identity as a potential husband. That is as much of who he is as a hero."

Now that they're engaged, the dynamic of their relationship will certainly change. "It's one thing to be a boyfriend, but when you start really sitting down and looking at the day-to-day life of a married couple, it gets a lot more complicated," Souders says. "The pressures come to more of a boiling point over the last course of the season."

Those pressures include Lois being in the shadow of the Man of Steel. "I don't know that I would want to date Superman," Peterson jokes.

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"That's a hard shadow to be in, but luckily Lois Lane is not one to stick to the shadows," Souders says. 

The intrepid reporter will use her skills at the Daily Planet to help distinguish herself. "She will try to step out in certain ways on her own and a lot of that is through her career," Peterson says. "She has her own destiny as a journalist, so we really want to highlight that."

Smallville returns Friday, Jan. 28 at 8/7c on the CW.