Wedding planning is in full swing for Olivia Culpo and Christian McCaffrey.

When taking part in an Instagram “ask me anything” over the weekend, the 31-year-old model revealed what has been “the most difficult thing” in the planning process thus far.

“Guest list is by FAR the hardest part,” Culpo replied in an Instagram Story. “A lot of venues have restrictions on # of ppl [people].”

Culpo, who announced her engagement to the star 49ers running back in April 2023, also expressed what she’s most looking forward to on the big day.

“Marrying my best friend!!!!!” the Sports Illustrated Swimsuit alum exclaimed of McCaffrey, 27, in a separate post.

Though details surrounding the couple’s upcoming nuptials have been kept under wraps, McCaffrey has been in awe of Culpo “steering the ship” where planning is concerned

‘“She’s done a hell of a job,” McCaffrey told “Extra” last month.

“She’s definitely steering the ship when it comes to anything regarding the wedding as of now, but I give my input when needed, but obviously her style is unbelievable and everything she wants I also like, so it’s going really well. I’m so thankful I have someone like her who’s not just supporting me the way she is, but also handling all stuff like that, allowing me to do what I love in the moment while she’s still working on her career as well.”

It’s been a busy start to the year for McCaffrey and Culpo.

The former Miss Universe winner supported the NFL’s reigning Offensive Player of the Year in February when he played in Super Bowl 2024.

The 49ers faced the defending champion Chiefs at Allegiant Stadium in Las Vegas, with San Francisco ultimately falling short in overtime, 25-22.

“Thanking God for a healthy season and for putting my best friend on this earth,” Culpo posted on Instagram following the loss.