Credit: Twitter

Modern Family actor Kevin Daniels is the latest Hollywood star to stop by the set of Castle for a Season 5 guest spot. Although we don't know much about his role on the hit crime procedural, we do know he's been having a grand ol’ time filming it.

"Having a blast on the #Castle set with @seamusdever," he tweeted on August 9, along with the above picture.

On August 10, Seamus returned the Twitter love, posting this photo of Kevin "in the box."

Credit: Twitter

We're loving this on-set bromance between the pair, but something tells us their on-screen relationship won't be so smooth. If Kevin's character is chilling in the interrogation room, we can only assume he's a suspect. And we all remember what happened in "Kick in the Ballistics," right? Detective Ryan, FTW!

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