NEW YORK — Julia Roberts’ Broadway bow — the show’s called “Three Days of Rain,” in case you hadn’t heard — played its first eight previews last week and racked up a huge $988,198.

That’s more than $200,000 above the official gross potential, thanks to boffo sales of $250 premium tickets, driving the tally way higher than the potential calculated from the $100 nonpremium top pricetag.

Total also reps a gigantic take for a straight play, putting “Rain” at No. 5 in the top 10. Not even soldout smash “The Odd Couple” ($896,829) — whose stars, Nathan Lane and Matthew Broderick, are mere Broadway royalty — has come so close to the million-dollar mark.

Elsewhere on the Rialto, almost every show not in previews saw a dip, due in part to the weekend’s switchover to daylight-saving time, which traditionally siphons off biz.

The other new contender of the week, tuner “The Wedding Singer,” took in a decent $292,127 for four previews.

“Tarzan” ($307,255) continued to swing, playing four perfs to almost-capacity crowds paying low-for-Broadway ticket prices. (Production’s top ticket is $75 during previews.) “Lestat” ($548,301) drew about 80% of capacity in its first seven-perf week.

Coming off a heavily comped opening week, “Well” ($106,151) rose just $15,000 from the prior sesh. Will the near-unanimous critical praise it garnered fuel a boost?

The 23 musicals grossed $14,380,520 for 81.0% of the Broadway total, with attendance of 203,172 at 88.5% capacity.

The nine plays grossed $3,473,051 for 19.0% of the Broadway total, with attendance of 48,841 at 71.2% capacity.

Average paid admission was $72.99 for musicals, $71.11 for plays and $72.63 for all shows.