Longtime Trump aide Hope Hicks reportedly expected to testify before congressional committee this week

White House Communications Director Hope Hicks will testify before one of the congressional committees investigating Russian election meddling Tuesday, according to a report.

Hicks, who was a trusted adviser to Donald Trump long before he became President, is expected to appear before the House Intelligence Committee for a closed-door interview, people familiar with the matter told CNN.

But it's unclear how much information Hicks, 29, will share with lawmakers. She did not return a request for comment from the Daily News.

California Rep. Adam Schiff, the intel committee's ranking Democrat, declined to confirm exactly when Hicks will testify, only telling reporters that he expects it to be "soon." Schiff also said he doesn't know how forthcoming Hicks will be, noting that he hopes she will be completely transparent about her time in the White House as well as her time on the campaign and the transition.

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"We don't know at this point if she will testify completely or fully as others who have served in the administration have, or whether she will do what Steve Bannon did, which was stonewall," Schiff said. "We hope obviously she will be cooperative, but at this point I don't know what we can expect."

Bannon, Trump's onetime chief strategist, infuriated lawmakers this month when he refused to answer questions from Schiff and other committee members, citing executive privilege on behalf of the President.

Hicks, who worked for Trump's namesake real estate company before joining his campaign, was the President's first hire as he prepared to announce his White House bid. She is rumored to have first-hand knowledge of a number of sensitive events during Trump's first year in office, including being onboard Air Force One when the President allegedly dictated a misleading statement about his son's meeting with a group of Russian operatives.

Hicks was supposed to testify before the House Intelligence Committee last month, but her appearance was postponed amid concerns about how much information she could share. She has already been interview by special counsel Robert Mueller's team and the Senate Intelligence Committee.