diff --git a/Common/Tools/Multiplicity/multGlauberNBDFitter.cxx b/Common/Tools/Multiplicity/multGlauberNBDFitter.cxx
index 85c86e808fd..c7a669f816b 100644
--- a/Common/Tools/Multiplicity/multGlauberNBDFitter.cxx
+++ b/Common/Tools/Multiplicity/multGlauberNBDFitter.cxx
@@ -33,6 +33,7 @@
 #include <TFitResultPtr.h>
 #include <TH1.h>
 #include <TH2.h>
+#include <TH3.h>
 #include <TMath.h>
 #include <TMathBase.h>
 #include <TNamed.h>
@@ -383,7 +384,7 @@ Double_t multGlauberNBDFitter::ContinuousNBD(Double_t n, Double_t mu, Double_t k
   return F;
 }
 
-void multGlauberNBDFitter::CalculateAvNpNc(TProfile* lNPartProf, TProfile* lNCollProf, TH2F* lNPart2DPlot, TH2F* lNColl2DPlot, TH1F* hPercentileMap, Double_t lLoRange, Double_t lHiRange)
+void multGlauberNBDFitter::CalculateAvNpNc(TProfile* lNPartProf, TProfile* lNCollProf, TH2F* lNPart2DPlot, TH2F* lNColl2DPlot, TH1F* hPercentileMap, Double_t lLoRange, Double_t lHiRange, TH3D* lNpNcEcc, TH2F* lEcc2DPlot)
 {
   cout << "Calculating <Npart>, <Ncoll> in centrality bins..." << endl;
   cout << "Range to calculate: " << lLoRange << " to " << lHiRange << endl;
@@ -419,6 +420,17 @@ void multGlauberNBDFitter::CalculateAvNpNc(TProfile* lNPartProf, TProfile* lNCol
     Double_t lNAncestors0 = (Int_t)(fNpart[ibin] * ff + fNcoll[ibin] * (1.0 - ff));
     Double_t lNAncestors1 = TMath::Floor(fNpart[ibin] * ff + fNcoll[ibin] * (1.0 - ff) + 0.5);
     Double_t lNAncestors2 = (fNpart[ibin] * ff + fNcoll[ibin] * (1.0 - ff));
+
+    TH1D* hEccentricity = 0x0;
+
+    if (lNpNcEcc) {
+      // locate the histogram that corresponds to the eccentricity distribution in this NpNc pair
+      lNpNcEcc->GetXaxis()->SetRange(lNpNcEcc->GetXaxis()->FindBin(fNpart[ibin]), lNpNcEcc->GetXaxis()->FindBin(fNpart[ibin]));
+      lNpNcEcc->GetYaxis()->SetRange(lNpNcEcc->GetYaxis()->FindBin(fNcoll[ibin]), lNpNcEcc->GetYaxis()->FindBin(fNcoll[ibin]));
+      hEccentricity = reinterpret_cast<TH1D*>(lNpNcEcc->Project3D("z"));
+      hEccentricity->SetName(Form("hEccentricity_%i", ibin));
+    }
+
     for (Long_t lMultValue = 1; lMultValue < lHiRange; lMultValue++) {
       Double_t lNancestors = lNAncestors0;
       if (fAncestorMode == 1)
@@ -444,6 +456,12 @@ void multGlauberNBDFitter::CalculateAvNpNc(TProfile* lNPartProf, TProfile* lNCol
         lNPart2DPlot->Fill(lMultValueToFill, fNpart[ibin], lProbability);
       if (lNColl2DPlot)
         lNColl2DPlot->Fill(lMultValueToFill, fNcoll[ibin], lProbability);
+      if (lNpNcEcc) {
+        // collapse the entire eccentricity distribution for this combo
+        for (int ib = 1; ib < hEccentricity->GetNbinsX() + 1; ib++) {
+          lEcc2DPlot->Fill(lMultValueToFill, hEccentricity->GetBinCenter(ib), lProbability * hEccentricity->GetBinContent(ib));
+        }
+      }
     }
   }
 }
diff --git a/Common/Tools/Multiplicity/multGlauberNBDFitter.h b/Common/Tools/Multiplicity/multGlauberNBDFitter.h
index 218caf43fc3..889398fad1a 100644
--- a/Common/Tools/Multiplicity/multGlauberNBDFitter.h
+++ b/Common/Tools/Multiplicity/multGlauberNBDFitter.h
@@ -15,6 +15,7 @@
 #include <TF1.h>
 #include <TH1.h>
 #include <TH2.h>
+#include <TH3.h>
 #include <TNamed.h>
 #include <TProfile.h>
 #include <TString.h>
@@ -77,7 +78,7 @@ class multGlauberNBDFitter : public TNamed
   Double_t ContinuousNBD(Double_t n, Double_t mu, Double_t k);
 
   // For estimating Npart, Ncoll in multiplicity bins
-  void CalculateAvNpNc(TProfile* lNPartProf, TProfile* lNCollProf, TH2F* lNPart2DPlot, TH2F* lNColl2DPlot, TH1F* hPercentileMap, Double_t lLoRange = -1, Double_t lHiRange = -1);
+  void CalculateAvNpNc(TProfile* lNPartProf, TProfile* lNCollProf, TH2F* lNPart2DPlot, TH2F* lNColl2DPlot, TH1F* hPercentileMap, Double_t lLoRange = -1, Double_t lHiRange = -1, TH3D* lNpNcEcc = 0x0, TH2F* lEcc2DPlot = 0x0);
 
   // void    Print(Option_t *option="") const;