The win for Halep also means she will not lose hold of her world number one ranking, no matter what happens in the next game.
Stephens maintained her spotless record against fellow American Madison Keys with a 6-4 6-4 win in the day's other semi-final clash.
She is 0-3 in major finals so far, losing to Maria Sharapova in the 2014 French Open final, to unseeded Jelena Ostapenko in last year's French Open final and to Caroline Wozniacki in this year's Australian Open final.
Three previous times, she played finals, including the 2017 French Open and the 2018 Australian Open.
"I think I played one of my best matches on clay", Halep said afterwards. "I played again one of my best matches on clay". As she told the press after her quarterfinal win, "There were times when I had to go back and hit a higher ball, where maybe before I would have tried to hit a line-drive victor". She said she expected an intense match against Sharapova, and, in a way, it was - intensely straightforward and efficient.
"And I have two more days until I will play the final. But for sure, I will fight for every ball".
Muguruza applauded Halep, who had the crowd behind her.
It was Halep who made a blistering start on Court Philippe-Chatrier as she broke Spaniard Muguruza's serve four times to win the opening set 6-1.
Simona Halep is coming off a three sets win over Angelique Kerber that took 30 games to decide. She didn't give up a point. It wasn't just the body "absorbing all of the wear and tear", Murray said, but absorbing it "all of a sudden".
Keys slipped two breaks down in the second but although she pulled one back Stephens served out for the match.
This was a less clear-cut victory but an early break of serve in each set put Stephens in control.
She needed only 70 minutes to eliminate Sharapova and dominated her with superb returning, breaking the former No. 1 a half-dozen times.
She improved to 3-0 against her longtime pal and Fed Cup teammate Keys, including their US Open final last September.
"I rushed too much at the beginning", Halep told a news conference. I didn't, like, try to do it.
"I think the book was 100 percent hearsay, at least all the stuff I read and the quotes that I read, which was a little bit disappointing", said Williams, who played in her first Grand Slam since giving birth past year.
As in NY nine months ago, it was a mistake-riddled performance from Keys, who committed 41 unforced errors to Stephens' 11. She made decent inroads in the tournament that turned her away past year but clearly viewed it as incremental progress after a flat, straight-sets loss to Spain's ascendant Garbine Muguruza.
Jared Leto's Joker will ride once again, but it is unclear of how or when Warner Bros. and DC Films plan to release the projects. Jared Leto is set to star in and executive produce a new standalone film based on his Suicide Squad character, The Joker .
In August, GitHub announced that it was looking for a CEO to replace Chris Wanstrath, one of the company's co-founders. While details of the deal are now unknown, it is believed that the official announcement could come later today.
Mourinho reckons Argentina will reign supreme in Group D, with Nigeria pipping Croatia and Iceland to the runners up spot. Which is the best shirt of the World Cup? To get the latest soccer news, text "SPORTS" to 22840.
Giuliani also confirmed that Trump still wants to testify to Mueller, but his legal team has advised him not to do so. Laywer Elura Nanos, writing for Law & Crime , said a pardon would be "too much for" Trump's presidency to bear.
Golden State ended its run of slow starts by taking a 32-28 lead after the first quarter of Game 2 in the NBA Finals Sunday night. Got to let it go. "He has gotten better gradually, but there's no way of knowing for sure at this point", Kerr said.
The iconic physical keyboard has 35 backlit keys with an integrated fingerprint sensor for extra security. One thing that the company will be able to shed light upon is that BlackBerry key next to the spacebar.
The XFL plans to have eight league-owned teams, 40-man rosters and a 10-week regular season during the NFL's offseason. He said he wants to deliver great football, which he said has been "one of the failings of the original league".
Washington's Jakub Vrana opened the flurry with a goal 6:24 into the second, rifling a shot over the glove of Marc-Andre Fleury. When a succession of teammates finally got the Cup back to Ovi, he handed it to Ted Leonsis, the Caps' owner since 1999.
NOAA's forecast is about the same with 10 to 16 named storms, 5 to 9 of those becoming hurricanes with 1 to 4 major hurricanes. Taking notes from last year's busy hurricane season, it appears people are taking heed and prepping early.
England 2-0 Costa Rica
England hosted Costa Rica at Elland Road on Thursday night, with Jordan Henderson captaining his side. Anything is possible and we have to go there with the highest expectations'.
Roseanne Returns To Twitter To Say She's A Jew
President Trump has since chimed in on Twitter - not exactly defending Barr , but rather complaining about his own treatment. Barr later tweeted that she has had odd experiences while taking the drug late at night.
Commerce Secretary: US reaches deal with China's ZTE
It has enjoyed the backing of Chinese President Xi Jinping, who has been negotiating with Trump over a broader trade agreement. Now, ZTE has reportedly signed an agreement with the US , but apparently the Commerce Department has not yet signed.
How to help fight plastic pollution for World Environment Day
He said, India will soon revive the Ganga, its most precious river. "India is the fastest-growing economy in the world today". He said, next year, UNEP will organise the United Nations environment assembly with a focus on sustainable lifestyles.
Melania Trump Will Not Travel to G7, North Korea Summits
Trump joked about all the speculation that his wife had supposedly left him but said she was doing fine, Pike said. Her absence from public events she would normally attend has sparked speculation in the USA media and on Twitter.
Fuego volcano eruption kills 25, injures hundreds in Guatemala
A disaster authority spokesman said a change in wind direction was to blame for the volcanic ash falling on parts of the capital. An ambulance of the volunteer firefighter unit carries the wounded from the village of El Porvenir after the eruption.