By-passer of large wedding

• Justice of the peace customer
• Runaway bride, say
• Lover on the run
• Short and sweet wedding attendee
• Juliet, for one
• Miss on the run
• Romeo, e.g
• One headed for a hitching post?
• One not getting any reception

Wiktionary Word definitions in Wiktionary
n. agent noun of elope; one who elopes.