Ryan Phillippe denies allegations of assaulting his ex-girlfriend

— -- Actor Ryan Phillippe is denying allegations by his ex-girlfriend that he physically assaulted her and threw her down a flight of stairs at his home earlier this year.

Elsie Hewitt, a 21-year-old model, filed a lawsuit against the "Crash" actor, 43, in Los Angeles Superior Court on Monday, asking for no less than $1 million in damages for assault, battery and intentional infliction of emotional distress.

Los Angeles officials investigated the matter, but no charges were filed.

Today, Phillippe slammed the allegations on Twitter, suggesting they were a "ploy for monetary gain."

"I am saddened and disgusted by the false allegations being circulated about me," the actor wrote. "At the time these allegations were initially made, I fully cooperated with law enforcement and a thorough investigation was conducted."

He went on to say that as a man "raised by women" he was "sickened" that his name was being mentioned in the same article as domestic violence.

"This is wrong," he said. "This is not who I am. Every one of my accuser's allegations are false."

In the lawsuit, obtained by ABC News, the actor's ex claimed that he got violent after they had an argument at a party on July 3 and he left early to return home.

When Hewitt later showed up at Phillippe's house to collect some of her things in the early morning hours of July 4, she claimed in the lawsuit that he was high on drugs and alcohol and that he attacked her -- grabbing her so tightly that he left bruises on her arm -- before throwing her down a flight of stairs.

The documents then said that after she got up, he allegedly "struck her, cornered her, kicked her, and aggressively pushed her to the ground."

A rep for Phillippe called the claims false.

"As a staunch advocate for the health, well-being and equality of women, Ryan is completely devastated that these false allegations have been made and circulated," his rep said in a statement. "Domestic violence is an incredibly serious issue and fabricated and proven false claims should not be used to unjustly slander the falsely accused. The claims are false."

In the documents, Hewitt said she went to the emergency room at Cedars-Sinai Medical Center following the alleged altercation. The suit said she was diagnosed with "chest wall pain, abrasions at multiple sites, and severe bruising." Hewitt also filed a police report, according to the lawsuit.

The Los Angeles Police Department confirmed to ABC News earlier today that it took a report on July 4, listing Phillippe as a suspect. As is common practice, an emergency protective order was immediately issued to the victim. But there is no indication that the actor was arrested.

The case was then submitted by the LAPD to the Los Angeles City Attorney.

The city attorney's office told ABC News that it held a hearing at the office, at which both parties were present and advised on the law and how to avoid similar incidents in the future. No charges were filed, and the office said it will take no further action.

Hewitt's attorney did not immediately respond to ABC News' request for comment.

Meanwhile, the Guess model posted on Instagram Monday that she has been facing "some tribulations."

Phillippe and Hewitt met in April at the Coachella music festival. Phillippe has two children with his ex-wife Reese Witherspoon and a daughter with his ex-girlfriend Alexis Knapp.