Starstruck (adjective)

1. Feeling overwhelmed with admiration or excitement upon meeting or seeing a famous person.
2. Feeling or showing great admiration or adoration for a celebrity.

Origin:

From "star" and "struck" meaning to be affected by the presence or image of a celebrity.

Examples:

1. She was starstruck when she met her favorite movie star.
2. The fans were starstruck when they saw the famous singer.
3. The actor was starstruck when he met his idol at the premiere.
4. The young girl was starstruck when she met her favorite popstar.
5. She was so starstruck that she couldn't even speak when she met him.