The market for all three couples—Taylor Swift and Travis Kelce marrying, Tom Holland and Zendaya marrying, and Timothée Chalamet and Kylie Jenner getting engaged—by December 31, 2026, sits near even odds with “No” at 51.5% because each relationship faces distinct timelines and public scrutiny without confirmed wedding dates or engagement announcements. Traders balance the couples’ long-term stability and past statements against the short window remaining and historical patterns of celebrity engagements that shift or stall. Fresh updates on any one pair, such as official engagement news, a scheduled ceremony date, or a confirmed split, would immediately recalibrate the implied probability across the combined resolution criteria.