Sean Lowe and Catherine Giudici
01/26/2014 AT 06:05 PM EST
It's not every day that a couple gets married in front of millions of people, so you could forgive The Bachelor
's Sean Lowe
and Catherine Giudici
for being a little nervous. But the pair, who will tie the knot live on ABC Sunday, couldn't be more zen about the big day.
"The only thing I can compare it to is the morning of a big game in college," jokes Lowe, 30. "But this is so much bigger than that! I don't think I've ever been more anxious and excited for anything."
"The soon-to-be newlyweds, who have been public about the fact that they are waiting to have sex until marriage
, will not see each other until Giudici, 27, walks down the aisle – they haven't texted or talked since after Saturday night's rehearsal dinner.
"When it hits me, it's going to be very intense," says the blushing bride. "Probably right before I see him, I'll be shaking. It's very similar to the [Bachelor
] proposal. I know he's going to be there and accepting me at the end. There's nothing to be nervous about!"
As for shedding a tear or two? Lowe will get emotional, "100 percent!" laughs Giudici. Admits the groom: "I get teary-eyed just thinking about it. This morning I put on our first dance song ["One Woman" by the Randy Rogers Band] and I got choked up. It's an incredible song. It just encapsulates everything that we are."
For now, both Giudici and Lowe are counting down the minutes until they become husband and wife. "This whole process is a blessing," says Giudici. "We met each other, became best friends and now it's going to be official!"