The thought actually brought a rare smile to her face.

Out of his sight, she allowed herself a rare smile.

Lee offered a rare smile in return, then turned to the computer himself.

He flashed one of his rare smiles at me, and it was like the sun coming out.

A rare smile played on the corners of his mouth.

"I understand," the professor said with one of his rare smiles.

When he gave a rare smile, the gesture never quite reached his eyes.

He chuckled and gave me one of his rare smiles.

Finally she made her decision, stepped toward Data, and gave him a rare, genuine smile.

One corner of his mouth tilted in a rare smile.