Conversation so far:
When was Matt Bomer born?
Matthew Staton Bomer was born on October 11, 1977
Where was Matt Bomer born?
Matthew Staton Bomer was born on October 11, 1977 in Webster Groves, Missouri.
Who were Matt Bomer's parents?
Matthew Staton Bomer was born on October 11, 1977 in Webster Groves, Missouri, to Elizabeth Macy and John O'Neill Bomer IV.

Question: did he have siblings?
Self-contained rewrite: Did Matt Bomer have siblings?