diff --git a/.gitmodules b/.gitmodules
index 770156842e28c..95a9344ebf919 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -72,3 +72,4 @@
 [submodule "cmake/external/onnx-tensorrt"]
 	path = cmake/external/onnx-tensorrt
 	url = https://github.com/onnx/onnx-tensorrt.git
+	branch = 8.2-GA
\ No newline at end of file
diff --git a/cmake/external/onnx-tensorrt b/cmake/external/onnx-tensorrt
index 4f54a1950e117..f42daeee49f25 160000
--- a/cmake/external/onnx-tensorrt
+++ b/cmake/external/onnx-tensorrt
@@ -1 +1 @@
-Subproject commit 4f54a1950e1174dca490900eb7b07cc374f53d41
+Subproject commit f42daeee49f2517a954c5601f0f76bef9ed94b62
diff --git a/onnxruntime/core/graph/contrib_ops/contrib_defs.cc b/onnxruntime/core/graph/contrib_ops/contrib_defs.cc
index a433951987f5f..b0d64c01c5d5b 100644
--- a/onnxruntime/core/graph/contrib_ops/contrib_defs.cc
+++ b/onnxruntime/core/graph/contrib_ops/contrib_defs.cc
@@ -2339,6 +2339,46 @@ void RegisterContribSchemas() {
         updateOutputShape(ctx, 0, output_shape);
       });
 
+  static const char* DisentangledAttention_TRT_ver1_doc =
+      R"DOC(Disentangled Attention TensorRT Plugin.)DOC";
+
+  ONNX_CONTRIB_OPERATOR_SCHEMA(DisentangledAttention_TRT)
+      .SetDomain(kOnnxDomain)
+      .SinceVersion(1)
+      .SetDoc(DisentangledAttention_TRT_ver1_doc)
+      .Input(0, "c2c_attention", "content-to-content attention tensor, QcKc^T.", "T") 
+      .Input(1, "c2p_attention", "content-to-position attention tensor, QcKr^T.", "T")
+      .Input(2, "p2c_attention", "position-to-content attention tensor, KcQr^T.", "T")
+      .Output(0, "disentangled_attention", "The disentangled attention output tensor.", "T")
+      .TypeConstraint("T", {"tensor(float)", "tensor(float16)"}, "Constrain input and output types to float tensors.")
+      .Attr("span", "Maximum relative distance, k.", AttributeProto::INT)
+      .Attr("factor", "Scaling factor applied to attention values, 1/sqrt(3d). d is hidden size per head = H/N. H is hidden size, N is number of heads.", AttributeProto::FLOAT)
+      .TypeAndShapeInferenceFunction([](ONNX_NAMESPACE::InferenceContext& ctx) {
+        // Type inference
+        using namespace ONNX_NAMESPACE;
+        propagateElemTypeFromInputToOutput(ctx, 0, 0); 
+
+        // Shape Inference
+        if (!hasInputShape(ctx, 0)) {
+          return;
+        }
+
+        auto& input0_shape = getInputShape(ctx, 0);
+        auto& input0_dims = input0_shape.dim();
+        if (input0_dims.size() != 3) {
+          fail_shape_inference("Input 0 shall be 3 dimensions");
+        }
+
+        // output dims is same as input[0] dims, i.e., regular c2c attention dims
+        // ONNX_NAMESPACE::TensorShapeProto disentangled_attention_shape;
+        // for (auto& dim : input0_dims) {
+        //   *disentangled_attention_shape.add_dim() = dim;
+        // }
+        // updateOutputShape(ctx, 0, disentangled_attention_shape);
+        propagateShapeFromInputToOutput(ctx, 0, 0); 
+
+      });
+
 #ifndef _OPSCHEMA_LIB_
   // Register the NCHWc schemas if supported by the platform.
   if (MlasNchwcGetBlockSize() > 1) {
@@ -2352,4 +2392,4 @@ void RegisterContribSchemas() {
 }
 
 }  // namespace contrib
-}  // namespace onnxruntime
+}  // namespace onnxruntime
\ No newline at end of file