Actor Kim Woo Bin will finally be making an appearance on "4 Sons and 1 Daughter".

The March 28th broadcast of MBC's "4 Sons and 1 Daughter" will feature male guest Kim Woo Bin as the youngest little brother.

The members went on a train ride with Kim Woo Bin. They seemed a little disappointed that Kim Woo Bin wasn't a female guest, and Kim Woo Bin seemed a little flustered at being snubbed. However, he adapted quickly and naturally acted as one family.

They arrived in Chuncheon and the members went off in search of their 'mom' and 'dad', stopping by at the town hall. They talked to the locals, introduced themselves, and inquired about their parents. Suh Jang Hoon said, "This time we're being joined by an awesome younger brother. Do you know Kim Woo Bin?" The grandmothers replied, "We know Kim Gu Ra," and revealed that they didn't know any of the other members, eliciting much laughter.

Kim Gu Ra seemed very pleased with himself, and Suh Jang Hoon said, "If you want to be well known among grandmas then you have to appear on television at least 7-8 times a week, like Gu Ra. You can't just come out 1-2 times a year like others."

Kim Woo Bin will look for his 'parents' along with his other 'family' members on the March 28th broadcast of MBC's "4 Sons and 1 Daughter".